<p dir="ltr">i've been using BackupPC for years professionally, big or small jobs, and for my personal stuff too, the modest configuration time is entirely worth the flexibility, efficiency, and reliability.</p>
<p dir="ltr">if you want multiple copies, the simplest and very reliable approach is just set up multiple BackupPC servers.</p>
<p dir="ltr">if you want better efficiency than that, one approach is just make copies of the BackupPC server's data, which i mention also only for the simplicity of it, but copying can be problematic with large data quantity, usually due to a very high volume of hardlinks.</p>
<p dir="ltr">for multiple copies i have had very good luck selecting and copying only the most recent full backups, and subsequent nonredundant incrementals, via rsync. a bit more thought was required, but it's been highly efficient.</p>