John,

You pretty much summed up what I already knew and what I have recently discovered. There are boxes that can be slipped inside the drive space inside the case that can be used any number of ways, easily exchanged (ejecting for hot swap, etc.) and I really don't need that. I have one SATA drive screwed onto the front of this HP (Pavilion a820n) that can be changed out, but the cables to it have the wiring to add a slave drive, there is just no place to put it in a stable setup (there isn't a cage in there). I could get one of these internal 2 drive enclosures and fasten it to where the existing drive is now, or I could look around and see about buying a cage, but I think the best bet is to simply get a new, larger SATA drive to replace the existing drive and get

choice a) a 2 drive external enclosure and move one of my other external drives into it (in an enclosure box already) so I'm using only one USB port for both

choice b) another 1 drive external enclosure and use it on yet another USB port on the computer. One more drive on the computer either way, but this would make three external hard drive boxes (the Western Digital is a freestanding drive, not just a box with a drive in it).

I think I shot myself in the foot with the Western Digital because I apparently partitioned it and when I was trying to find my ghost backup I couldn't find the partition with the most recent backup (July 2008--I knew I wasn't losing my mind!). I think I'll remove that partition, and use that drive for just the backup, do it incrementally every week.

SRS