1 tb drive: This one lives in my office at UBC. I partitioned it so there are 3 separate "drives". One partition is for incremental Time Machine backups. Another partition is for a bootable clone of my hard drive using Carbon Copy Cloner. This means that if my hard drive fails, I could use someone else's laptop to boot from my clone (you can't do this with a Time Machine backup). I think I have it set so that it doesn't archive changes (like Time Machine does) so the clone should be exactly the same size as my hard drive when it's cloned. The third partition is for files that I don't need on my computer anymore but don't want to delete permanently (some photos and music).
500 gb drive: This drive lives at the museum. It has two partitions: one for incremental Time Machine backups, and one for those files.
320 gb drive: This one is with me in Ukenzagapia and is the same size as my MacBook hard drive. Previously, I used Time Machine to back up to it, but I'd really be SOL in Ukenzagapia if I had to buy a new MacBook to get at the files! Now I'm using Carbon Copy Cloner to make a bootable clone of my drive without archiving.
Additionally, I have an 8 gb flash drive that I will put all of my most important documents on as a final backup. I should back up to the flash drive and my Ukenzagapia drive every Sunday at the very least.
A friend of mine recently had an external hard drive with years of photos fail on her, so I want to be sure that any files I have only on an external drive are on more than one external drive.
What do you think? Suggestions for improvement?