Contents21
- The Switch 2 only takes microSD Express
- Phone apps want A1 or A2
- Choose video cards by bitrate
- Dashcams need a high-endurance card
- Capacity, speed marks and buses
- Which capacity works in my device?
- Which speed marking do I match?
- Does a faster card or bus help?
- Picks by condition
- Switch 2
- Video up to 240 Mbps
- Phone
- Dashcam or security camera
- Picks by size
- FAQ
- Which microSD card works with the Nintendo Switch 2?
- Are Class 10, U1 and V10 the same?
- How do I choose between V30, V60 and V90?
- Is the “up to” speed printed on a card guaranteed?
- Do I need an A2 microSD card for my phone?
- Does a dashcam need a high-endurance card?
Choose an SD Express microSD card for the Switch 2, A1 or better for phone apps, and for video up to 240 Mbps, V30 or above by bitrate.
- Games: see the Switch 2 section right below
- Phones: see “Phone apps want A1 or A2”
- Video: see “Choose video cards by bitrate”
- Dashcams: see “Dashcams need a high-endurance card”
The Switch 2 only takes microSD Express
Per Nintendo’s US support page, the Nintendo Switch 2 only works with microSD Express cards, up to 2 TB.
- Per Nintendo’s US support page, a regular microSD card from the original Switch can’t store games or save data on the Switch 2, though you can still copy off its screenshots and videos
- Samsung’s 256GB card for the Switch 2 reads at up to 800 MB/s. In UHS-I mode it reads at 90 MB/s
A card’s maximum speed does not tell you how much faster a game will load. Load times were not tested on a real console.
Nintendo’s US support page gives no game size guide. Check the size of each game you plan to play.
Phone apps want A1 or A2
Check that your phone supports A2 before you pay for it.
Per the SD Association, A1 and A2 are markings for running apps. IOPS is how many small reads or writes a card can do per second. You only get A2 speed when the device supports A2 too.
| Marking | Minimum random read | Minimum random write |
|---|---|---|
| A1 | 1,500 IOPS | 500 IOPS |
| A2 | 4,000 IOPS | 2,000 IOPS |
Choose video cards by bitrate
In this calculation, the write speed a recording needs in MB/s is its bitrate in Mbps divided by 8. The table compares Video Speed Class markings and gives the lowest V rating that covers it, plus the recording time on a 256 GB card. Match the marking family your device asks for.
In this calculation, V60 covers above 240 Mbps up to 480 Mbps, and V90 covers above 480 Mbps up to 720 Mbps. It’s borderline for V60 above 432 Mbps up to 480 Mbps, and for V90 above 648 Mbps up to 720 Mbps.
| Recording bitrate | Write speed needed | Lowest V rating | Recording time (at most) |
|---|---|---|---|
| 50 Mbps | 6.25 MB/s | V10 | about 682 min |
| 100 Mbps | 12.5 MB/s | V30 | about 341 min |
| 150 Mbps | 18.75 MB/s | V30 | about 227 min |
| 200 Mbps | 25 MB/s | V30 | about 170 min |
| 240 Mbps | 30 MB/s | V30, borderline | about 142 min |
| 300 Mbps | 37.5 MB/s | V60 (UHS-II or faster) | about 113 min |
| 400 Mbps | 50 MB/s | V60 (UHS-II or faster) | about 85 min |
| 600 Mbps | 75 MB/s | V90 (UHS-II or faster) | about 56 min |
| 800 Mbps | 100 MB/s | Beyond V90 | about 42 min |
- Per the SD Association, V60 and V90 are meant for a UHS-II or faster bus, so both the device and the card need UHS-II
Use the bitrate from your device’s manual. The tool below turns your use and bitrate into the marking you need.
Which microSD marking you need (from the use and bitrate)
Pick the use (Switch 2, phone, video or dashcam) and a capacity to see which card type and markings you need. For video and dashcams it turns the recording bitrate into the write speed needed, the lowest speed class that covers it, and how long the card records. It also shows one card that fits.
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Dashcams need a high-endurance card
Put high-endurance cards first for a dashcam. There are two reasons.
- Per Samsung’s official pages, Samsung’s consumer PRO Plus and microSD Express cards exclude dashcams, security cameras and other write-heavy use from their warranty
- Per SanDisk’s official pages, the SanDisk High Endurance 256GB is rated for up to 20,000 hours of recording. That’s for Full HD; 4K gets fewer hours
The official pages give no lifespan in years.
Capacity, speed marks and buses
Which capacity works in my device?
Per the SD Association, the capacity standards are:
- SDHC: above 2 GB up to 32 GB
- SDXC: above 32 GB up to 2 TB, for devices that support SDXC or SDUC
- SDUC: above 2 TB up to 128 TB
- SDHC cards use FAT32, and SDXC and SDUC cards use exFAT
Which speed marking do I match?
Class 10, U1 and V10 all list 10 MB/s on paper, but mixing symbol families isn’t guaranteed to give the expected write speed. Match the family your device asks for.
- U3 and V30: at least 30 MB/s
- V60: at least 60 MB/s
- V90: at least 90 MB/s
For recording, look at the write figure, not the read figure.
A speed class is the standard way a card states a minimum write speed. Some makers also state one for a card, such as SanDisk’s 210 MB/s for its microSD Express 256GB.
Does a faster card or bus help?
An “up to” speed is a maximum, not a minimum. The same SanDisk Extreme (SDSQXH9) is rated up to 170 MB/s write at 256GB but 120 MB/s at 128GB. Both are maximums.
A bigger card is not necessarily slower. In that example, the larger card has the higher maximum write speed.
The bus is the path between the device and the card: UHS-I, then UHS-II, then SD Express, from slowest to fastest. A slow bus in the device holds back a fast card.
Picks by condition
Check that your device accepts the capacity before you buy. The conditions:
- The maker’s official page lists the markings
- Sold new by Amazon.com or the maker
- At least 100 ratings and 4 stars or more
- Not a marked-up third-party import
Among current models from major brands, each pick is the cheapest listing that met these. Check prices on the store.
Switch 2
It is marked microSD Express, with up to 650 MB/s write.
Whether the rating count is shared with other models on the listing wasn't checked.
Video up to 240 Mbps
V30 is marked, and it is built for dashcams and security cameras. Recording from above 216 Mbps up to 240 Mbps is borderline.
Phone
A2, U3 and V30 are marked. A2 only helps if your phone supports it.
Dashcam or security camera
It is a high-endurance card whose maker publishes recording hours.
Picks by size
Other sizes where a current model from a major brand qualified, picked the same way. Video rows are for recording at up to 240 Mbps, and the calculator shows the pick for the size you choose, or the nearest size if there isn’t one. Video (V60) rows are for above 240 Mbps up to 480 Mbps, need a UHS-II device, and are the one V60 model that met the criteria.
| Use | Size | Pick |
|---|---|---|
| Switch 2 | 512GB | SanDisk microSD Express 512GB |
| Switch 2 | 1TB | Lexar PLAY PRO microSD Express 1TB |
| Phone | 64GB | SanDisk Extreme microSD 64GB |
| Phone | 128GB | SanDisk Extreme microSD 128GB |
| Phone | 512GB | SanDisk Extreme microSD 512GB |
| Phone | 1TB | SanDisk Extreme microSD 1TB |
| Phone | 2TB | SanDisk Extreme microSD 2TB |
| Video | 32GB | SanDisk High Endurance microSD 32GB |
| Video | 64GB | SanDisk Extreme microSD 64GB |
| Video | 128GB | SanDisk High Endurance microSD 128GB |
| Video (V60) | 128GB | Lexar Professional GOLD microSDXC UHS-II 128GB |
| Video (V60) | 256GB | Lexar Professional GOLD microSDXC UHS-II 256GB |
| Video | 512GB | SanDisk Extreme microSD 512GB |
| Video | 1TB | SanDisk Extreme microSD 1TB |
| Video | 2TB | SanDisk Extreme microSD 2TB |
| Dashcam | 32GB | SanDisk High Endurance microSD 32GB |
| Dashcam | 64GB | SanDisk MAX ENDURANCE microSD 64GB |
| Dashcam | 128GB | SanDisk High Endurance microSD 128GB |
FAQ
Which microSD card works with the Nintendo Switch 2?
Per Nintendo’s US support page, the Nintendo Switch 2 only works with microSD cards built to the SD Express standard, up to 2 TB.
Are Class 10, U1 and V10 the same?
Class 10, U1 and V10 all list 10 MB/s on paper, but mixing symbol families isn’t guaranteed to give the expected write speed. Match the family your device asks for.
How do I choose between V30, V60 and V90?
In this calculation, recording at up to 240 Mbps is covered by a V30 card (at least 30 MB/s). Above 216 Mbps up to 240 Mbps the headroom is under 10%, so it’s borderline.
Above that, see the table for V60 and V90.
Is the “up to” speed printed on a card guaranteed?
No. An “up to” speed is a maximum, not a minimum. A speed class is the standard way a card states a minimum write speed, and some makers also state one for a specific card.
One SanDisk card line is rated up to 170 MB/s write at 256GB but 120 MB/s at 128GB. Both are maximums.
Do I need an A2 microSD card for my phone?
Check that your phone supports A2 before you pay for it. Per the SD Association, A1 and A2 are markings for running apps.
IOPS is how many small reads or writes a card can do per second. You only get A2 speed when the device supports A2 too.
Does a dashcam need a high-endurance card?
Put high-endurance cards first for a dashcam. Per Samsung’s official pages, some of Samsung’s consumer cards exclude dashcams, security cameras and other write-heavy use from their warranty.
Per SanDisk’s official pages, one of its high-endurance 256GB cards is rated for up to 20,000 hours of recording. That’s for Full HD; 4K gets fewer hours.
Data and formulas used (for verification)
How this was checked: Worked out from the official pages of the SD Association and the makers as of October 2026. No card was tested in person.
Sources: SD Association speed class ／ SD Association application performance class ／ SD Association bus speed ／ SD Association capacity standards ／ Nintendo Switch 2 microSD (US) ／ SanDisk Extreme ／ SanDisk High Endurance ／ SanDisk microSD Express ／ Samsung microSD Express datasheet ／ Samsung PRO Plus
Method
- Write speed needed (MB/s) = recording bitrate (Mbps) ÷ 8. The bitrate is the device’s rated value for the recording mode; swings during recording aren’t modeled.
- The lowest marking is the lowest symbol in the SD Association’s speed class table whose minimum write speed is at least the speed needed. Video Speed Class: V6 = 6 MB/s, V10 = 10 MB/s, V30 = 30 MB/s, V60 = 60 MB/s, V90 = 90 MB/s; UHS Speed Class: U1 = 10 MB/s, U3 = 30 MB/s; Speed Class: Class 10 = 10 MB/s (read from the table image on the official page). The bitrate limits are 240 Mbps for V30, 480 Mbps for V60 and 720 Mbps for V90. If the headroom (marking minimum − speed needed) ÷ marking minimum is under 10%, it’s marked borderline (this article’s own threshold).
- The SD Association says combinations across symbol families (for example a Class 10 host with a U1 card) aren’t guaranteed to give the expected write speed, so different families aren’t treated as interchangeable. V60 and V90 are meant for a UHS-II or faster bus, so they’re shown as conditional.
- Recording time (minutes) = capacity (GB) × 8000 ÷ bitrate (Mbps) ÷ 60, rounded down. 1 GB counts as 1 billion bytes (as in SanDisk’s footnotes and on card labels); the space lost to the file system isn’t subtracted, so it’s an upper estimate.
- Capacity classes follow the SD Association’s table (SDHC above 2GB up to 32 GB, FAT32; SDXC above 32GB up to 2 TB, exFAT; SDUC above 2TB up to 128 TB). A1 and A2 follow the Application Performance Class table (A1: 1500 IOPS random read, 500 IOPS random write; A2: 4000 IOPS and 2000 IOPS; both 10 MB/s sustained write). The Switch 2 rules come from Nintendo’s US support page (microSD Express only, up to 2 TB).
- Makers’ read and write speeds are maximums, not guarantees. Picks are cards whose markings were confirmed on the maker’s official page or datasheet, among new listings sold by Amazon or the maker directly with at least 100 ratings and 4 stars, where the model bought matches the official model number; the cheapest including shipping is chosen. No card was tested in person.
Official values used
| Item | Value | Source | Checked |
|---|---|---|---|
| SDHC capacity upper limit | 32 GB | sdcard.org Capacity table: SDHC more than 2GB up to 32GB (FAT32); SDXC more than 32GB up to | 2026-10-08 |
| SDXC capacity lower bound (more than this) | 32 GB | sdcard.org Capacity table: SDHC more than 2GB up to 32GB (FAT32); SDXC more than 32GB up to | 2026-10-08 |
| SDXC capacity upper limit | 2 TB | sdcard.org Capacity table: SDHC more than 2GB up to 32GB (FAT32); SDXC more than 32GB up to | 2026-10-08 |
| SDUC capacity upper limit (more than 2TB) | 128 TB | sdcard.org Capacity table: SDHC more than 2GB up to 32GB (FAT32); SDXC more than 32GB up to | 2026-10-08 |
| SDHC file system | FAT32 | sdcard.org Capacity table: SDHC more than 2GB up to 32GB (FAT32); SDXC more than 32GB up to | 2026-10-08 |
| SDXC and SDUC file system | exFAT | sdcard.org Capacity table: SDHC more than 2GB up to 32GB (FAT32); SDXC more than 32GB up to | 2026-10-08 |
| Hosts that accept an SDXC card | SDXC card works in SDXC and SDUC hosts only | sdcard.org SDXC memory cards can be used with SDXC devices and SDUC Host Devices | 2026-10-08 |
| UHS-I bus speed (SDR104) | 104 MB/s | sdcard.org Bus speed table (re-read on the original page, 2026-10-08) | 2026-10-08 |
| UHS-II bus speed (full duplex) | 156 MB/s | sdcard.org Bus speed table (re-read on the original page, 2026-10-08) | 2026-10-08 |
| UHS-II bus speed (half duplex) | 312 MB/s | sdcard.org Bus speed table (re-read on the original page, 2026-10-08) | 2026-10-08 |
| UHS-III bus speed (full duplex, lower) | 312 MB/s | sdcard.org Bus speed table (re-read on the original page, 2026-10-08) | 2026-10-08 |
| UHS-III bus speed (full duplex, upper) | 624 MB/s | sdcard.org Bus speed table (re-read on the original page, 2026-10-08) | 2026-10-08 |
| SD Express bus speed (PCIe Gen3 x1) | 985 MB/s | sdcard.org Bus speed table (re-read on the original page, 2026-10-08) | 2026-10-08 |
| SD Express bus speed (PCIe Gen4 x1) | 1970 MB/s | sdcard.org Bus speed table (re-read on the original page, 2026-10-08) | 2026-10-08 |
| SD Express bus speed (PCIe Gen4 x2) | 3940 MB/s | sdcard.org Bus speed table (re-read on the original page, 2026-10-08) | 2026-10-08 |
| Class 2 minimum write speed | 2 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| Class 4 minimum write speed | 4 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| Class 6 minimum write speed | 6 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| Class 10 minimum write speed | 10 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| UHS Speed Class U1 minimum write speed | 10 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| U3 minimum write speed | 30 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| Video Speed Class V6 minimum write speed | 6 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| V10 minimum write speed | 10 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| V30 minimum write speed | 30 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| V60 minimum write speed | 60 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| V90 minimum write speed | 90 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| SD Express Speed Class E150 minimum write speed | 150 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| E300 minimum write speed | 300 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| E450 minimum write speed | 450 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| E600 minimum write speed | 600 MB/s | sdcard.org Table image (SpeedClass9.1EN.png, opened 2026-10-08): minimum sequential write s | 2026-10-08 |
| Matching host and card speed class symbols | Choose the same or higher class symbol than the host’s; different symbol families are not guaranteed to substitute (e.g. host Class 10 with a U1 card) | sdcard.org Best Combination between Speed Class Host and Card | 2026-10-08 |
| Bus mode needed for V60 / V90 | V60 and V90 are used in UHS-II mode or faster; U1/U3 in SDR50/DDR50 or faster; E-classes in SD Express mode | sdcard.org Regarding bus mode, it is necessary to use a bus mode fast enough that does not | 2026-10-08 |
| A1 minimum random read | 1500 IOPS | sdcard.org Specification table image (img_application.jpg, opened 2026-10-08): A1 1500 / 50 | 2026-10-08 |
| A1 minimum random write | 500 IOPS | sdcard.org Specification table image (img_application.jpg, opened 2026-10-08): A1 1500 / 50 | 2026-10-08 |
| A2 minimum random read | 4000 IOPS | sdcard.org Specification table image (img_application.jpg, opened 2026-10-08): A1 1500 / 50 | 2026-10-08 |
| A2 minimum random write | 2000 IOPS | sdcard.org Specification table image (img_application.jpg, opened 2026-10-08): A1 1500 / 50 | 2026-10-08 |
| A1/A2 minimum sustained sequential write | 10 MB/s | sdcard.org Specification table image (img_application.jpg, opened 2026-10-08): A1 1500 / 50 | 2026-10-08 |
| When A2 performance is available | A2 performance is available only with an A2-capable host and an A2 card; at least A1 performance is available with A1 and A2 combinations | sdcard.org Specification table image (img_application.jpg, opened 2026-10-08): A1 1500 / 50 | 2026-10-08 |
| microSD cards usable in Switch 2 | Nintendo Switch 2 is only compatible with microSD Express cards | en-americas-support.nintendo.com ‘Nintendo Switch 2 is only compatible with microSD Express cards.’ (opened 2026- | 2026-10-08 |
| Old Switch microSD in Switch 2 | A microSD card used with Nintendo Switch cannot save or load digital games or save data on Switch 2; screenshots and videos from the original Switch can still be retrieved | en-americas-support.nintendo.com Inserting a microSD card previously used on a Nintendo Switch console into Switc | 2026-10-08 |
| Switch 2 microSD Express capacity limit | 2 TB | en-americas-support.nintendo.com microSD Express cards with a capacity of up to 2TB are supported | 2026-10-08 |
| First-use system update | A system update via the internet is required the first time a microSD Express card is used | en-americas-support.nintendo.com Please note: a system update via the internet is required the first time you use | 2026-10-08 |
| Express card in the original Switch | On a Nintendo Switch console a microSD Express card reads and writes at the speed of a microSD card | en-americas-support.nintendo.com On a Nintendo Switch console, the data reading and writing speed for a microSD E | 2026-10-08 |
| SanDisk Extreme (SDSQXH9) 256GB max read | 245 MB/s | sandisk.com [256GB-1TB] Up to 245MB/s read speed (beyond UHS-I 104MB/s; compatible devices r | 2026-10-08 |
| SanDisk Extreme (SDSQXH9) 256GB max write | 170 MB/s | sandisk.com [256GB-1TB] Up to 170MB/s write speed | 2026-10-08 |
| Same card, 128GB max write (varies by capacity) | 120 MB/s | sandisk.com [128GB] Up to 120MB/s write speed | 2026-10-08 |
| Previous Extreme 128GB max write | 90 MB/s | sandisk.com Footnote: For 128GB: Up to 90MB/s write speeds (256GB-1TB: up to 130MB/s) | 2026-10-08 |
| SanDisk High Endurance max read | 100 MB/s | sandisk.com Up to 100MB/s read speed | 2026-10-08 |
| SanDisk High Endurance max write | 40 MB/s | sandisk.com Up to 40MB/s write speed | 2026-10-08 |
| SanDisk High Endurance 256GB recording hours (Full HD only, up to) | 20000 hours | sandisk.com Up to 20,000 hours for 256GB. Full HD video only; total hours less for 4K UHD vi | 2026-10-08 |
| SanDisk MAX ENDURANCE 256GB recording hours (Full HD only, up to) | 120000 hours | sandisk.com Up to 120,000 hours/over 13 years for 256GB. Full HD video only | 2026-10-08 |
| SanDisk MAX ENDURANCE max write | 40 MB/s | sandisk.com Up to 100MB/s read speed, up to 40MB/s write speed | 2026-10-08 |
| SanDisk microSD Express 256GB max write | 650 MB/s | sandisk.com [256GB] Up to 880MB/s read, up to 650MB/s write | 2026-10-08 |
| SanDisk microSD Express 256GB minimum sustained write | 210 MB/s | sandisk.com [256GB] 210MB/s minimum sustained write speed | 2026-10-08 |
| Same card 512GB minimum sustained write | 220 MB/s | sandisk.com [512GB] 220MB/s minimum sustained write; [1TB] 745MB/s | 2026-10-08 |
| Samsung microSD Express 256GB max read | 800 MB/s | download.semiconductor.samsung.com Sequential Read Speed (SD Express) 800 MB/s, (UHS-I) 90 MB/s; Speed Class Class | 2026-10-08 |
| Same card read speed in UHS-I mode | 90 MB/s | download.semiconductor.samsung.com Sequential Read Speed (UHS-I) 90 MB/s | 2026-10-08 |
| Lexar PLAY PRO Express max read | 900 MB/s | americas.lexar.com Up to 900MB/s read and 600MB/s write | 2026-10-08 |
| Lexar PLAY PRO Express max write | 600 MB/s | americas.lexar.com Up to 900MB/s read and 600MB/s write | 2026-10-08 |
| Samsung PRO Plus 256GB max read | 180 MB/s | samsung.com Read: up to 180MB/s, Write: up to 130MB/s; Speed Class U3, V30, A2 | 2026-10-08 |
| Samsung PRO Plus 256GB max write | 130 MB/s | samsung.com Read: up to 180MB/s, Write: up to 130MB/s | 2026-10-08 |
| Dashcam use excluded from warranty on consumer cards | Samsung’s warranty for PRO Plus and microSD Express does not extend to dashcam, CCTV, surveillance and other write-intensive uses | samsung.com Warranty does not extend to dashcam, CCTV, surveillance camera and other write-i | 2026-10-08 |
| How card capacity is labeled (1 GB = 1 billion bytes) | 1GB = 1,000,000,000 bytes (1TB = 1 trillion bytes); actual usable capacity is less | sandisk.com | 2026-10-08 |
| Largest microSD Express card found | 1000 GB | sandisk.com | 2026-10-16 |
| Largest high-endurance microSD card found | 512 GB | sandisk.com | 2026-10-16 |
Which microSD marking you need (from the use and bitrate): quick reference
The calculator in this article shows the result for your own settings. Settings can be set in the URL; each link below opens the calculator with those settings.
| Settings | Result | Calculator |
|---|---|---|
| Switch 2, 256GB | ✓ You need microSD Express. The Switch 2 only works with microSD Express cards. Supported up to 2TB. A regular microSD card from the original Switch can’t store games or save data (screenshots and videos can still be copied off). The first time you use a microSD Express card, the console needs a system update over the internet. 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC | Open with these settings |
| Phone, 256GB | ✓ Pick A1 or better. A1 means at least 1500 random-read and 500 random-write IOPS, which is what apps lean on. A2 means at least 4000 and 2000 IOPS, but you only get A2 speed if the phone supports A2 too. 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. Check your phone’s spec sheet for the largest card it takes | Open with these settings |
| Video (camera), 50Mbps, 256GB | ✓ V10 or better is enough. Write speed needed: 6.25 MB/s (bitrate ÷ 8). Lowest marking: Video Speed Class V10 (at least 10 MB/s). If your device specifies a UHS Speed Class: U1 (at least 10 MB/s). If your device specifies a Speed Class: Class 10. Mixing symbol families isn’t guaranteed to give the expected speed, so match the family in your device’s manual. Recording time on 256GB: about 682 min (about 11 h 22 min, an upper estimate). 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label | Open with these settings |
| Video (camera), 100Mbps, 256GB | ✓ V30 or better is enough. Write speed needed: 12.5 MB/s (bitrate ÷ 8). Lowest marking: Video Speed Class V30 (at least 30 MB/s). If your device specifies a UHS Speed Class: U3 (at least 30 MB/s). Mixing symbol families isn’t guaranteed to give the expected speed, so match the family in your device’s manual. Recording time on 256GB: about 341 min (about 5 h 41 min, an upper estimate). 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label | Open with these settings |
| Video (camera), 150Mbps, 256GB | ✓ V30 or better is enough. Write speed needed: 18.75 MB/s (bitrate ÷ 8). Lowest marking: Video Speed Class V30 (at least 30 MB/s). If your device specifies a UHS Speed Class: U3 (at least 30 MB/s). Mixing symbol families isn’t guaranteed to give the expected speed, so match the family in your device’s manual. Recording time on 256GB: about 227 min (about 3 h 47 min, an upper estimate). 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label | Open with these settings |
| Video (camera), 200Mbps, 256GB | ✓ V30 or better is enough. Write speed needed: 25 MB/s (bitrate ÷ 8). Lowest marking: Video Speed Class V30 (at least 30 MB/s). If your device specifies a UHS Speed Class: U3 (at least 30 MB/s). Mixing symbol families isn’t guaranteed to give the expected speed, so match the family in your device’s manual. Recording time on 256GB: about 170 min (about 2 h 50 min, an upper estimate). 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label | Open with these settings |
| Video (camera), 240Mbps, 256GB | △ V30 just covers it. Write speed needed: 30 MB/s (bitrate ÷ 8). Lowest marking: Video Speed Class V30 (at least 30 MB/s). If your device specifies a UHS Speed Class: U3 (at least 30 MB/s). Mixing symbol families isn’t guaranteed to give the expected speed, so match the family in your device’s manual. Only 0% to spare, so it’s borderline. Recording time on 256GB: about 142 min (about 2 h 22 min, an upper estimate). 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label | Open with these settings |
| Video (camera), 300Mbps, 256GB | △ You need V60 (UHS-II or faster). Write speed needed: 37.5 MB/s (bitrate ÷ 8). Lowest marking: Video Speed Class V60 (at least 60 MB/s). V60 and V90 are meant for a UHS-II or faster bus. Check that both the device and the card support UHS-II. Recording time on 256GB: about 113 min (about 1 h 53 min, an upper estimate). 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label | Open with these settings |
| Video (camera), 400Mbps, 256GB | △ You need V60 (UHS-II or faster). Write speed needed: 50 MB/s (bitrate ÷ 8). Lowest marking: Video Speed Class V60 (at least 60 MB/s). V60 and V90 are meant for a UHS-II or faster bus. Check that both the device and the card support UHS-II. Recording time on 256GB: about 85 min (about 1 h 25 min, an upper estimate). 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label | Open with these settings |
| Video (camera), 600Mbps, 256GB | △ You need V90 (UHS-II or faster). Write speed needed: 75 MB/s (bitrate ÷ 8). Lowest marking: Video Speed Class V90 (at least 90 MB/s). V60 and V90 are meant for a UHS-II or faster bus. Check that both the device and the card support UHS-II. Recording time on 256GB: about 56 min (an upper estimate). 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label. No listing at V90 or better met our criteria | Open with these settings |
| Video (camera), 800Mbps, 256GB | ✕ Even V90 falls short. Write speed needed: 100 MB/s (bitrate ÷ 8). That’s more than V90’s minimum of 90 MB/s. Recording time on 256GB: about 42 min (an upper estimate). 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label. No listing met our criteria for these settings | Open with these settings |
| Video (camera), 100Mbps, 128GB | ✓ V30 or better is enough. Write speed needed: 12.5 MB/s (bitrate ÷ 8). Lowest marking: Video Speed Class V30 (at least 30 MB/s). If your device specifies a UHS Speed Class: U3 (at least 30 MB/s). Mixing symbol families isn’t guaranteed to give the expected speed, so match the family in your device’s manual. Recording time on 128GB: about 170 min (about 2 h 50 min, an upper estimate). 128GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label | Open with these settings |
| Dashcam, 25Mbps, 256GB | ✓ V6 or better is enough. Write speed needed: 3.13 MB/s (bitrate ÷ 8). Lowest marking: Video Speed Class V6 (at least 6 MB/s). If your device specifies a UHS Speed Class: U1 (at least 10 MB/s). If your device specifies a Speed Class: Class 10. Mixing symbol families isn’t guaranteed to give the expected speed, so match the family in your device’s manual. Recording time on 256GB: about 1,365 min (about 22 h 45 min, an upper estimate). Dashcams overwrite the oldest footage, so this is roughly how far back it keeps. Some consumer cards exclude write-heavy use like dashcams from their warranty (Samsung PRO Plus and microSD Express). High-endurance cards publish a recording-hours rating (SanDisk High Endurance 256GB: up to 20,000 hours, Full HD). 256GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label | Open with these settings |
| Dashcam, 50Mbps, 128GB | ✓ V10 or better is enough. Write speed needed: 6.25 MB/s (bitrate ÷ 8). Lowest marking: Video Speed Class V10 (at least 10 MB/s). If your device specifies a UHS Speed Class: U1 (at least 10 MB/s). If your device specifies a Speed Class: Class 10. Mixing symbol families isn’t guaranteed to give the expected speed, so match the family in your device’s manual. Recording time on 128GB: about 341 min (about 5 h 41 min, an upper estimate). Dashcams overwrite the oldest footage, so this is roughly how far back it keeps. Some consumer cards exclude write-heavy use like dashcams from their warranty (Samsung PRO Plus and microSD Express). High-endurance cards publish a recording-hours rating (SanDisk High Endurance 256GB: up to 20,000 hours, Full HD). 128GB is SDXC (exFAT). An SDXC card works only in devices that support SDXC or SDUC. This counts 1 GB as 1 billion bytes; usable space is a little less than the label | Open with these settings |
