Just wan to ask if someone here have tried backing up the backup directory to an external USB drive? I know there’s a symbolic link in it and how are you going to restore it from external drive manually to a new server machine.
Depending on how many backups you have, and how many files in the backups are stored as hard links the only viable way to backup the backups is to do a block level backup. You can use any disk imaging or backup software for that, e.g. things like clonezilla, dd, etc.
I don’t know about any tool on Windows that resects the hard links yet. Copying the symlinks correctly isn’t that important. They are just there for your convenience and have no internal purpose (i.e. UrBackup will work without them). Maybe cygwin equivalents of rsync or cpio will work on Windows. If you disover anything in this area, please tell us!
I think I have to add a section about this in the manual