Restic is great, and the de-duplication between snapshots is amazingly good. Same content in different files (e.g. tar files of linux systems) take very little space like magic). Backrest is a nice web frontend for it.
Note that you should use some retention features of your provider to manage the risk of ransomware deleting your backups.
olivier@lemmy.fait.ch 4 days ago
you might want to add borg, restic and - more recently - plakar to that list