Arq backup works great. It does encrypted incremental snapshot backups to your personal S3 account (unlike most services which hold your backups hostage). It has an open-source recovery program. It has a documented format.
For local backups, I use a poor-man's Time Machine — rsync with hard links. It's how Time Machine works under the hood anyway, and I used it long before Apple baked it into the OS. Works great.
The OP uses Windows, though, so I honestly have no idea what equivalents to these options exist which would work with, e.g., NTFS.
For local backups, I use a poor-man's Time Machine — rsync with hard links. It's how Time Machine works under the hood anyway, and I used it long before Apple baked it into the OS. Works great.
The OP uses Windows, though, so I honestly have no idea what equivalents to these options exist which would work with, e.g., NTFS.