this should work just fine:
sudo dd if=/dev/sde of=my_backup.img status=progress
afterwards you can compress it with xz or something to save some space. dd works at the block level so it doesn't matter what format it is. restoring it should be a matter of:
sudo dd if=my_backup.img of=/dev/sde...
signed up today as well. Linux needs to be a first-class class citizen in the retro-gaming scene and free software is a must for future preservation. thanks for your contributions!
