If that's the case, I assume bandwidth isn't a problem. Correct? I'd go without backups: if a power outage breaks your blocks directory, just let it sync from scratch.

May I suggest rsync?
I use something like this:
This creates hard links for all unchanged files to the last backup, and adds new files. You can keep weekly snapshots without much additional storage space.

Please fix your quotes. You'll need to manually add [ /quote] and [ quote] in between.