[BetterRed]

I've used calibre for 10+ years. since day one I've done incremental backups of its data (libraries, as of today 10, and its config) to a USB attached drive on a daily basis. And an over the wire disaster recovery copy on a weekly basis, initially to a commercial FTP server and since that left town to Onedrive. I've been using GoodSynch to backup all my data since 2007.

I have never needed to restore an entire library (not even my shambolic much abused Test library), I've only ever needed to restore a 'book' folder or a book's format file because of a blunder on my part. And I do it using the calibre GUI… the backup is a calibre library, so I can use Copy to Library to restore a 'book' and Add files to selected book records to restore a format file.

Using archive formats like ZIP/TAR/7Z/RAR etc for backing up data is a remnant of the 20th century. Just for fun I created a max compression RAR4 of 35 video clips who total size was 2,344,850,345 bytes. The archive is 2,328,232,052 byte, a saving of 16,618,293 - less than 1%. Firstly, why would I bother. Secondly, if I add a 36th clip what then, do I create another 2.5Gb archive and copy that wherever.

BR