The Best Memory Cards for Creators: SD and microSD Speed Classes Explained
Disclosure: We did not test these cards ourselves. This guide combines the makers' published specs with independent speed tests and owner reports, all linked inline. As an Amazon Associate I earn from qualifying purchases.
Short answer: for drones, action cameras and phones, buy a U3, V30, A2 microSD such as the Samsung PRO Plus. For a mirrorless camera with a UHS-II slot, a V60 card such as the Lexar Professional 1800x covers most stills and 4K; step up to V90 only for 8K or very high-bitrate video. A Nintendo Switch 2 needs a microSD Express card; nothing else works for its games.
The speed classes, explained
A card carries several overlapping marks. The video marks (V30, V60, V90) are the ones to buy by, because they promise a minimum sustained write speed in MB/s, which is what video recording needs (SD Association). The big "up to" number on the front is a read speed, usually measured with the maker's own reader.
| Mark on the card | What it guarantees | Good for |
|---|---|---|
| Class 10, U1 | at least 10MB/s sustained write | 1080p video, photos, phones |
| U3, V30 | at least 30MB/s sustained write | 4K video in most phones, drones and action cameras |
| V60 | at least 60MB/s sustained write; needs UHS-II | high-bitrate 4K, fast photo bursts |
| V90 | at least 90MB/s sustained write; needs UHS-II | 8K, high-bitrate 4K 120p, long RAW bursts |
| A1, A2 | minimum random speed for apps (A2: 4,000 read and 2,000 write operations a second) | phones, tablets, handheld consoles, Raspberry Pi |
| UHS-I, UHS-II, Express | the bus: up to 104MB/s, 312MB/s and 985MB/s | a fast bus only helps if the device and reader support it |
Sources: SD Association speed classes; Kingston's speed class guide for the A-ratings and bus limits. UHS-I cards rated above 104MB/s reach it with proprietary modes and a matching reader, as SanDisk and Samsung both footnote.
Match the card to the device
- Drones: check your drone's recommended-card list. DJI publishes one per model; for the Mini 4 Pro it lists V30 and V90 cards (DJI).
- Mirrorless cameras: use the camera manual's minimum for each video mode. A UHS-II card only runs at UHS-II speed in a UHS-II slot (Wirecutter).
- Phones and tablets: look for A2 as well as V30, because apps and photo libraries are random reads and writes.
- Nintendo Switch 2: microSD Express only. The original Switch takes ordinary microSD (Nintendo support).
- Older devices: a slot marked SDHC takes cards up to 32GB, not SDXC (Wirecutter).
microSD cards
microSD: best for most devices
Samsung PRO Plus microSD
Capacity options: 128GB, 256GB, 512GB, 1TB
Interface: UHS-I; U3, V30, A2
Rated speed: up to 180MB/s read, 130MB/s write (with a Samsung reader)
Best for: drones, action cameras, phones, the original Switch and Steam Deck
Skip if: you own a Switch 2, or the card goes in a dashcam or security camera
Specs and warranty from Samsung: a 10-year limited warranty that excludes dashcam, CCTV and other write-heavy use. Wirecutter's top microSD pick, fastest in its latest round at small random reads and writes, and easy to find at major retailers (Wirecutter). Complaints: the 180MB/s figure needs Samsung's own reader, and older stock carries lower 160/120 ratings, so read the label.
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Check the current price on AmazonmicroSD: widest drone support
SanDisk Extreme microSD
Capacity options: 64GB to 1TB
Interface: UHS-I; U3, V30, A2
Rated speed: up to 190MB/s read (170MB/s at 64GB); write up to 130MB/s at 256GB and larger, 90MB/s at 128GB
Best for: 4K drones and action cameras, phones and tablets
Skip if: you cannot buy from a trusted seller; it is one of the most faked cards
Specs from SanDisk, whose footnote says the read speed beyond the UHS-I limit needs a compatible reader. DJI lists SanDisk V30 cards among its recommended cards for drones such as the Mini 4 Pro (DJI). Common complaint: counterfeits. Wirecutter advises buying only from reputable first-party sellers because fakes report the wrong capacity and run slower (Wirecutter), and photographers on Reddit describe receiving fakes and testing every new card (r/photography).
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Check the current price on AmazonmicroSD: budget
Samsung EVO Select microSD
Capacity options: 64GB to 1TB (the 64GB card is U1)
Interface: UHS-I; U3, V30, A2 from 128GB up
Rated speed: up to 160MB/s read; Samsung lists write only as lower than read
Best for: phones, tablets, the original Switch and 1080p cameras on a budget
Skip if: you record high-bitrate 4K; buy a card with a stated write speed
Specs from Samsung, with the same 10-year limited warranty and write-heavy exclusions as the PRO Plus. Its weak spot is right in the spec sheet: no published write speed, and the smallest size drops to U1.
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Check the current price on AmazonmicroSD Express for Nintendo Switch 2
microSD Express: Switch 2
PNY microSD Express
Capacity options: 128GB, 256GB, 512GB, 1TB
Interface: microSD Express
Rated speed: up to 890MB/s read; write 550MB/s (128GB) up to 850MB/s (1TB); lifetime limited warranty
Best for: Nintendo Switch 2 game storage
Skip if: your device is not a microSD Express host: elsewhere it runs at ordinary microSD speed
Specs from PNY. Wirecutter's Switch 2 pick: one of the fastest Express cards it tested and usually in stock at several retailers (Wirecutter). The complaint is cost: Express cards are much more expensive per gigabyte than regular microSD.
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Check the current price on AmazonmicroSD Express: Switch 2
SanDisk microSD Express for Nintendo Switch 2
Capacity options: 256GB, 512GB, 1TB
Interface: microSD Express
Rated speed: up to 880MB/s read; write up to 650MB/s (256GB) and 800MB/s (1TB); lifetime limited warranty
Best for: Switch 2 owners who want the licensed card
Skip if: you only need storage for an original Switch, a phone or a camera
Specs from SanDisk. Nintendo says the Switch 2 accepts only microSD Express cards for games, and that an Express card in an original Switch works at standard microSD speed (Nintendo support). Tom's Hardware ranks several Express cards for the console if this one is out of stock (Tom's Hardware).
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Check the current price on AmazonFull-size SD cards for cameras
SD: budget for cameras
SanDisk Extreme SD UHS-I
Capacity options: several; Wirecutter recommends 128GB for most cameras
Interface: UHS-I; U3, V30
Rated speed: up to 180MB/s read with SanDisk QuickFlow (64GB to 512GB), up to 130MB/s write
Best for: stills, 1080p and most 4K 30p video in entry-level mirrorless and compact cameras
Skip if: your camera has a UHS-II slot and you shoot fast bursts or high-bitrate video
Specs from SanDisk. Wirecutter's budget SD pick with a limited lifetime warranty; it wrote at about 86MB/s through a ProGrade reader and near 130MB/s through SanDisk's and OWC's readers, so the reader matters (Wirecutter). Complaint: older generations rated 150MB/s or 90MB/s are still on sale under the same name; look for 180MB/s on the label.
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Check the current price on AmazonSD: best for most camera owners
Lexar Professional 1800x SDXC UHS-II GOLD
Capacity options: 64GB, 128GB, 256GB, 512GB, 1TB
Interface: UHS-II; U3, V60
Rated speed: up to 280MB/s read; up to 210MB/s write (64 to 128GB), 205MB/s (256GB to 1TB)
Best for: 40-megapixel stills, bursts and 4K video in UHS-II cameras
Skip if: your camera only takes UHS-I; you pay for speed it cannot use
Specs and the limited lifetime warranty from Lexar. Wirecutter's top SD pick: 197MB/s writes, the fastest of the V60 cards it tested, and no problems in over a decade of using Lexar Professional cards (Wirecutter). Complaints: full speed needs a UHS-II camera and reader, and retailers still list older SKUs with lower 270/180 ratings.
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Check the current price on AmazonSD: pro video
SanDisk Extreme PRO SD UHS-II V90
Capacity options: 64GB, 128GB, 256GB, 512GB
Interface: UHS-II; U3, V90
Rated speed: up to 300MB/s read, 300MB/s write; lifetime limited warranty
Best for: 8K and high-bitrate 4K video and long RAW bursts on UHS-II cameras
Skip if: your camera tops out at 4K 30p; a V60 card is enough
Specs from SanDisk. In long-running speed tests by a working photographer this model measured just above its 300MB/s write rating and topped the chart (Have Camera Will Travel). The complaint: SanDisk reuses the Extreme PRO name on several cards, so check for model SDSDXDM with 300MB/s read and write printed on the card.
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Check the current price on AmazonComparison table
Rated speeds are the makers' figures at the best capacity; smaller cards often write slower.
| Card | Format | Bus | Video class | Rated read / write (MB/s) | Pick it for |
|---|---|---|---|---|---|
| Samsung PRO Plus | microSD | UHS-I | V30, A2 | 180 / 130 | drones, action cams, phones |
| SanDisk Extreme | microSD | UHS-I | V30, A2 | 190 / up to 130 | drones, action cams |
| Samsung EVO Select | microSD | UHS-I | V30, A2 | 160 / not stated | budget phones and consoles |
| PNY microSD Express | microSD | Express | n/a | 890 / up to 850 | Switch 2 |
| SanDisk microSD Express for Switch 2 | microSD | Express | n/a | 880 / up to 800 | Switch 2 |
| SanDisk Extreme SD | SD | UHS-I | V30 | 180 / 130 | entry cameras |
| Lexar Professional 1800x GOLD | SD | UHS-II | V60 | 280 / up to 210 | most UHS-II cameras |
| SanDisk Extreme PRO V90 (SDSDXDM) | SD | UHS-II | V90 | 300 / 300 | 8K and pro video |
How to avoid fake cards
- Buy from the brand's own store page or a retailer selling and shipping the card itself, not an unknown marketplace seller (Wirecutter).
- Test every new card before you trust it: a full-capacity test such as H2testw writes the whole card and reads it back, so a fake reports its real size. It erases the card, so run it first (r/photography).
- Tom's Hardware's database of more than 200 tested microSD cards includes fakes and endurance failures if you want to check a brand (Tom's Hardware).
A card holds the only copy of a shoot until you offload it. Copy it to a drive the same day: our external SSD guide and backup setup guide cover where the footage goes next.
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Frequently asked questions
What does V30 mean on a memory card?+
V30 guarantees a minimum sustained write speed of 30MB/s, enough for 4K video in most phones, drones and action cameras. V60 and V90 guarantee 60MB/s and 90MB/s and need a UHS-II card.
Does the Nintendo Switch 2 work with a regular microSD card?+
Not for games. Nintendo says the Switch 2 is only compatible with microSD Express cards for game storage. The original Switch uses regular microSD cards.
Is a UHS-II card faster in a UHS-I camera?+
No. It works, but at UHS-I speed. Buy UHS-II only if your camera, or at least your card reader, has a UHS-II slot.
Why does my card not reach the speed on the label?+
The large number is usually a read speed measured with the maker's own reader. Write speeds are lower, and many UHS-I cards above 104MB/s need a matching reader to reach their rating.
How do I check if a memory card is fake?+
Run a full-capacity test such as H2testw on a new card before you use it. It writes the whole card and reads it back, so a fake shows its real size. It erases the card.