Just a word of warning, I've been playing with Storage Spaces using 3 x 16Gb USB Flash drives.

If you give SS to much hassle (plugging/unplugging) the drives vanish and win8 refuses to see them again, they show in device manager with driver loaded, but do not show up in device manager.

The only way I've found to recover them (as to re-use the drive, not get the data back) is put them in a down-level (Win7) machine and delete the reserved partition from the drive using diskpart.