backups for SD card disk image? that don't take up tonnes of space and can be rolled back? - Lemmy.World

I would like to make manual backups of an SD card as a disk image so that it can be easily recreated when needed. I’d like to keep a few versions in case there is a problem I didn’t know about, it can be rolled back. How can I do this incrementally, or with de-duplication, so that I don’t have to keep full copies of the complete SD card? It’s very big but most of the content won’t be changing much. It’s for MiyooCFW [https://github.com/TriForceX/MiyooCFW/releases/tag/2.0.0-beta] ROM which is on FAT 32-formatted micro SD card. Thanks for your help! Also let me know if I am going about the problem in a wrong way.