How to store internal hard drives?

mike writes: I have been ripping all my movies and TV shows for easy viewing through a media PC. Because I would rather not rip everything again I'm looking for a simple backup solution. I'm considering a hard drive dock and several internal hard drives to use as "disks" to back things up every once in a while but I don't know what the best way to store internal drives would be in the meantime. Could they sit together in any empty box an be OK or would a number of externals be worth the slightly higher cost with fewer worries about storing them in the meantime?