How to Back Up Camera Photos Before Formatting an SD Card

You can reclaim a memory card once a shoot exists in two independent places and you’ve checked that both copies open. Seeing thumbnails in a photo library only tells you the program can show the thumbnails. The following routine gives you a clear point at which the card can go back in the camera.

Make one dated folder for the original files

Create a folder such as 2026-11-11_Portraits. If you used several cards, give each a subfolder so cameras that reuse file names cannot overwrite one another. Copy the full card folder structure when you’re unsure how the camera stores video metadata or links parts of a recording. Keep original raw files, JPEGs and clips distinct from exports so you can tell what came from the camera.

If you use an editor with a catalog, find out where it stores the originals and where it saves your edits. A catalog backup may contain editing instructions and previews while referring to originals on another drive. Back up both locations if you need to restore a complete job.

Put the second copy on a separate device

Copy the folder to a second drive or an independent backup service with a way to retrieve original files. Two folders on the same drive share the risk of that drive failing. If you use a cloud service, wait for the upload to finish and download a sample original to confirm it’s available at full size. Check what happens to the cloud copy when you delete a local file, since some sync services mirror deletions.

The Library of Congress recommends keeping copies on different media in separate physical locations. For a photo job you can’t repeat, move one copy off-site once it has been checked. Keep the card intact in the meantime, especially when you’re traveling with both drives in one bag.

Verify both copies, then format the card

Compare the file counts and folder sizes where the tools allow it. Open original files from each copy, including the first and last frame, a raw file if you shot raw and any long video clips. A checksum-based copy tool can verify the contents of every file when the shoot warrants that extra check. Once both copies pass, follow the camera manufacturer’s instructions to format the card.

If you’re buying a spare to leave more time for verification, check the camera’s SD card speed class requirements before ordering. A spare that can’t record your usual mode won’t help on a long shoot.