Not sure if you are looking to single-file backups or an actual backup solution that includes good encryption. I have very good experience with restic (https://

Not sure if you are looking to single-file backups or an actual backup solution that includes good encryption. I have very good experience with restic (https://restic.net/ https://restic.net/), which encrypts all backups and does deduplication, using it on production servers with millions of files, as well as for home use (rather 100k files order of magnitude). It would be a bit too cumbersome for single-file use, though.