A while back I shared about my backup solution, where I use a DLink DNS-323 to make backups from one drive to another, once per night. This prevents me from accidentally deleting a file and loosing it forever. Unfortunately, the safety net is only for one day, because if you need to recover it the next day, the data from the day before is overwritten and the data is gone forever.
However, Mac has the concept of Time Machine, where you can go back to any point in time and recover any of the old versions of files that you’ve ever had. It’s an interesting concept, but making a full copy everyday will run out of storage after 2-3 backups! Fortunately, I have learned that using rsync, which is how I’ve been backing up from one drive to another, you can actually make a full backup every day, without wasting space for files that haven’t changed.
So with a full backup everyday, I don’t have to worry about overwriting a file and not being able to recover it, because I can go to any version of any file on any day. Now that’s a backup solution!
Actually, what you’ve described is also how Time Machine works. It doesn’t recopy files that haven’t changed, even though it appears to the user as though it has done a full copy during any given backup.
I’d like to see a blog posting on Pocket IIe!