Well if you use them all as one drive and loose one you have lost the data on all! I know it is hard to let go of them but anything under 120GB to me today is not worth keeping. (I actually have a couple of them in the closet as a back up with all my digital Photos, less bothersome than a pile of CD's)
This isn't for the storage space as I have over 3.5TB of storage on my machine. I more just want a project to built and if I can make use of these babies I will do. They make up about 400GB together. Anyway I can have these as externals and one drive?