Best Overall
SanDisk Extreme PRO 256GB
Key details
- Capacity
- 256 GB
- Read Speed
- Up to 200 MB/s
- Speed Class
- U3, V30, C10
- Write Speed
- Up to 140 MB/s
SanDisk rates this card at up to 200 MB/s read and 140 MB/s write, with V30, U3 and Class 10 markings on a 256 GB SDXC card. Read speed is what you feel at the desk; write speed is what you feel in the camera. Two hundred is the highest read figure here, and 140 MB/s of write headroom is what keeps a burst of raw frames and a 4K clip moving while the buffer catches up.
Two qualifications belong beside those numbers. The read figure assumes a reader built to the card's own spec — SanDisk points to its Professional PRO-READER, sold separately — so a plain USB reader leaves a good share of that speed unused. And this is a UHS-I card: drop it into a camera with a UHS-II slot and the second row of contacts does nothing. Neither changes the recommendation for the UHS-I bodies most people will put it in.
The bigger question is whether 256 GB on one card suits how you shoot. It removes the mid-shoot swap, and it also means one failure costs a whole day of pictures rather than half of one. We treat that as a reason to offload at every break rather than a reason to carry something smaller; the card recorded our 4K clips without stalling, and it is the one from this group that stays in the bag for a shoot that matters.
For a camera with a single UHS-I slot, this is our default: the fastest offload here, the highest stated write speed of the UHS-I cards, and enough capacity that you stop thinking about cards altogether. If your body has UHS-II, the Lexar pair makes better use of the hardware.
Pros
- Fastest read speed here, up to 200 MB/s
- 140 MB/s writes handle 4K and burst shooting
- 256 GB cuts mid-shoot card swaps
- Works in any UHS-I camera slot
Cons
- One large card concentrates the risk
For a UHS-I camera, this is the card we buy: 140 MB/s writes, a 256 GB capacity that ends mid-shoot swaps, and the fastest offload in this group.