The right camera memory card is one your camera supports, with enough speed for the way you shoot and enough capacity for a full day. Begin by checking which card type your camera uses, then look at speed markings for video and burst photography. The details below help you match the two.
Common Card Types
| Type | Typical use |
|---|---|
| SD, SDHC, SDXC | Most mirrorless and DSLR cameras, and many compact cameras |
| microSD | Action cameras, drones, and some small devices |
| CompactFlash | Older professional DSLRs |
| CFexpress | Newer high end cameras shooting high resolution video and fast bursts |
| CFast and XQD | Some earlier professional bodies |
Cards are not interchangeable between these formats, so check your camera manual for the supported types. Some cameras have two slots, sometimes of different types.
Understanding Speed Markings
- Read and write speed, shown in megabytes per second: write speed matters most for shooting, and read speed matters for copying files to a computer.
- Video speed class (V30, V60, V90): the number is a minimum sustained write speed in megabytes per second, useful for high bitrate video.
- UHS speed class (U1 and U3): another minimum sustained write figure used for SD cards.
- UHS-I and UHS-II: UHS-II cards have an extra row of pins and can be faster, but only if the camera supports UHS-II.
A fast card in a camera that cannot use that speed will simply run at the camera’s limit.
Choosing Capacity
Capacity depends on file size. RAW photos and high bitrate video take far more space than standard JPEG files. As a general rule, choose a card that holds a full outing, then carry a spare. Several mid size cards are often a better habit than one very large card, since a lost or damaged card then affects fewer files.
How to Match a Card to Your Camera
- Check the manual for card type, maximum capacity, and supported speed standards.
- Decide your main use: casual photos, fast action bursts, or high resolution video.
- For bursts and video, look at the maker’s recommended card list for your model.
- Buy from authorized sellers to avoid counterfeit cards.
- Format the card in the camera, not on a computer, before your first use.
- Copy files to a computer or backup drive soon after shooting.
FAQ
Can I use a microSD card in an SD slot?
Yes, with a proper adapter, though it is better to use a card made for your camera type when heavy video use is expected.
Do I need the fastest card?
Not usually. Match the card to your camera’s maximum speed and your recording needs. Extra speed beyond that gives little benefit in shooting.
The Short Version
Confirm the card type your camera uses, choose a speed class that fits your video or burst shooting, and pick a capacity that covers your outings. Format in camera, buy from trusted sellers, and back up often.
