Need more portable storage to use with my iMac

Hi everyone,

I'm a photographer who is continually needing more space to store my images. Currently I'm set up with a 2TB external drive connected via Firewire containing three volumes: One for CCCloner, one for Time Machine backup, and one for Storage. I'm also backing up to DVDs.

I'm thinking of getting an additional 2 TB external to use strictly for storage which will allow me to increase the size of the volumes for CCC, and Time Machine

on the first external.

I'm also thinking it might be a good idea to get some portable drives that I would use purely for backup of my images and only attach them when I needed to access the images stored on them.

Any suggestions for reliable devices (for $100 or less)?

Thanks for any info.

flashDriver