Summary: Mine died after a couple of years in my blu-ray player. I read on another review that there is a micro sd card inside, so I took mine apart. Sure enough there is a unbranded micro sd card inside. I tore apart the back looking for it, but it ended up sliding out from the front.
Summary: Nice small size but it takes forever to load it up with music. The little tether cord that it comes with is difficult to lace into the small holes (the cap keeper holes) Finally got it with a pair of tweezers and a safety pin. The packaging is a little odd.
Summary: Very good when it's working, and one day... it DIES! WON'T even show up in my desktop or being detected at all. Can't fix it as of now, but trying hard to get it back to work. Truly a very portable drive; small & heck yea, 4GB, it's the BOMB!