I opened it, connected it, and it was detected as a a removable storage device immediately by my Windows 7 system. Highly recommend this one if you are looking for 500GB at an excellant.
Plug-n-play, no annoying sync software, quiet, and very fast. Has it's own USB cable. No external power needed. Does exactly what I neded - share date between 2 computers with a manual A/B switch
None - love it - perfect! Fingerprints on glossy surface if that bothers you