After a near fatal (to me) scare recently, I'm in the mode to double and triple backup my computer, since it runs my laser (and everything else in the business).

I normally keep a reasonable level of backups on a Flash Drive.

I'm looking at a external hard drive and using some replicator software to basically mirror the drive on a normal basis. In looking at it all, I'm confused on why I should use a Hard Drive vs. a Flash Drive. I don't have a lot of photos that need to be backed up, so my file sizes are relatively low. I believe a 16GB flash drive would be more than enough to backup the important files.

That's one option. The other option is just buy a big fat drive and replicate the entire drive.

Any opinions on why I should or shouldn't use the flash drive over the hard drive?