Memory Card Care & Picks
Corrupted or Deleted Video from a Memory Card is one of the more common scenarios in this catalog, and a disproportionate share of those cases trace back to the same two things: a card that was mishandled in the field, or a card that was never particularly reliable to begin with.
Handling that actually matters
Never remove a card while the camera is writing to it or its access light is on — that's the single most common cause of the "recording exists but won't play" failure this catalog's video-recovery article describes in detail, where a file's index never finishes being written. Format cards in the camera that will use them, not on a computer, since cameras often expect a specific filesystem structure that a generic computer format doesn't always recreate correctly. And treat a full card as a reason to offload and back up, not a reason to keep shooting past its rated capacity by deleting individual files in-camera, which fragments the card's remaining free space in ways that make later recovery, if it's ever needed, considerably messier.
Why the card itself matters
Counterfeit and off-brand cards are a real, well-documented problem in this category specifically — a card that reports a much larger capacity than it actually has, silently overwriting old data once its real (smaller) capacity is reached, is a common counterfeit behavior, and it looks identical to ordinary corruption from the outside. Buying from an authorized retailer and sticking to a small number of established brands removes most of that risk. Beyond counterfeiting, genuine differences in build quality and rated write-cycle endurance mean a cheap card is more likely to develop real corruption under heavy use, particularly continuous 4K/8K video recording, which writes far more continuously than still photography does.
Prices verified August 2026 directly from a major retailer, in USD. 2026 has seen genuinely unusual flash-memory price increases industry-wide due to a supply shortage — if these look higher than you remember, that's a real market shift, not a markup added here. Confirm the current price before buying.
SanDisk Extreme PRO SDXC (128GB, UHS-I)
Everyday choiceThe reasonable default for most cameras that don't specifically require UHS-II: fast enough for 4K video on the vast majority of consumer and prosumer bodies, from an established brand, at a price that doesn't make buying a spare a hard decision.
- SpeedUp to 200MB/s read, 90MB/s write
- RatingUHS-I, V30, U3, Class 10
Sony TOUGH SF-G (128GB, UHS-II)
Demanding useBuilt for the cases where the card itself, not just the data on it, needs to survive something — a one-piece molded shell with no write-protect switch to snap off, rated for drops, water immersion, dust, and temperature extremes. The UHS-II speed also matters for high-bitrate video and burst photography that would bottleneck on a UHS-I card. A meaningfully higher price for a meaningfully different use case, not just a premium badge.
- SpeedUp to 300MB/s read, 299MB/s write
- RatingUHS-II, V90, U3, Class 10
- DurabilityDrop, water immersion, dust, X-ray, and temperature resistant per Sony's spec
For the recovery side of a corrupted or unreadable card, see File Carving, Explained and the full directory of recovery software by vendor.
This page describes the general situation, not a guaranteed fix for your specific case. If you'd rather have someone experienced take a look before you try anything, see what a hands-on evaluation looks like.