I wondered why anyone would have so many drives, and video editing is one of the few things that would do it.

Not sure how familiar you are with these things, but in the longer term, as cash permits, you might try rigging up some sort of a RAID array. I'm sure the hardware is available for home RAID systems. RAID (Rapid Array of Inexpensive Disks), for the uninitiated, comes in several flavours, and generally speaking can be used to provide a high performance and redundance. A RAID 5 array, for instance, can suffer a failed drive without missing a beat or losing any data.

Sorry if I'm talking down to you, you may already know this stuff, but certainly something too look at in the long term for video-editing.

I'm sure wikipedia has a good article on RAID.

Good luck!