I have a multi-layer backup scheme for the home machines using a large NAS, and several USB drives. The NAS backups happen automatically, and the USB backups are manual. I get a prompt every week to do an off-line backup. I turn the drives on, run the backup procedures from a batch file, and turn the drives off. If disaster befalls me, or heaven forbid, I get some sort of computer virus, I have the off-line backups that are at the most a week old.
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