I ordered this product thinking that I was getting an authentic Microsoft Hard Drive for my Xbox Slim. Instead, I received a 'refurbished' or 'rebuilt' Hard Drive for the XBox Fat (Original/Elite). With a set of Torx screws, I was able to disassemble the case for the hard drive and place it in the hard drive case for my Xbox Slim.
The seal on the hard drive had been broken and and new seal had been placed over the screw.
The hard drive did not have the Xbox emulation software on it to play download Classic Xbox games. As this was the primary reason for me to get this hard drive, this was a huge disappointment for me.
I was able to hack this drive to put the emulation software on it, but I would HIGHLY suggest getting the authentic Microsoft hard drive from another reseller if this is important to you.
Please understand when you buy this product from this reseller that you are NOT receiving an authentic Microsoft Slim Xbox hard drive. This drive will NOT work for you if you have bought any original Xbox games (Halo etc...) from the Xbox Marketplace and downloaded them to your Xbox 360, as it is missing the emulation software.
**Updated March 2013: The Hard drive that was sent seized after 2 months. The vendor was very good about providing a refund quickly, less shipping.