The Vosonic X’S-Drive Pro VP 300 is 40GB external hard drive that is clunky, cheap-looking, has a crappy text-only integrated screen, plays MP3s, but not WMA, AAC, or OGG Vorbis, and can only read from one card from its card reader at a time. So why would any photographer want it? Because it’s cheap, it does the primary job it was designed to do (act as remote backup for memory cards), and can accept as many additional 2.5-inch laptop hard drives as you want to swap into it, meaning that all other things aside, you can purchase this single $335 drive and continue to upgrade it for only the price of additional hard drives.