I bought this hard drive to load some DLC onto my Xbox 360 Slim which only had 4GB of internal storage. It's not a true Microsoft hard drive, but it works the same way and costs a lot less. I had a few problems getting it into the Xbox - it was very tight and I had to work really hard to get it out. there. This made me a little nervous and I'm not sure if I'll have a hard time getting it out or not (I haven't taken it out since I put it in there). Otherwise I had no problems. I've been using it for about 6 months and have loaded various DLC packs on it as well as a whole game and it works great.