I realize this isn't really what you're talking about in this thread, but it's similar.

I recently installed most of BIAB & RB on a 32 gig USB flash drive. All the RTs wouldn't fit, so I left off those I'm not really interested in. I'm getting ready to travel in my RV and wanted something smaller than the USB hard drive BIAB came on. Seems to work fine. I get the feeling generating RTs is a bit faster than my laptop hard drive, but never measured it. BIAB does seem to take more time to shut down. Looks like it's writing some sort of file to the flash drive. My flash drive appears to be slow in writing, as evidenced by the loooong time it took to copy BIAB stuff to it initially. I keep all my songs and generated WAVs on my laptop drive.

Overall, I'm very satisfied with it so far.