Start off by first removing the HDD unit from the Xbox 360 main console and lay it flat with the connector side facing upwards. You will see 3 screws. The 4th screw is located underneath the silver "Microsoft" sticker -- removing this sticker instantly voids your HDD unit's warranty.
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Once you have removed all 4 screws, lift up the plastic cover while being careful that it is latched onto the button-release end of the unit. You'll want to be careful as not to pop the spring loaded button and lose the tiny spring. [ Register or Signin to view external links. ] Once open, you will see the 2.5" Serial ATA notebook hard drive encased in a metal shell. Lift off the cover of the protective shell by first removing the four black screws holding it down. To proceed further you will need to have a thin knife. The metal casing is attached to the plastic shell by a very strong adhesive, and to remove the actual hard drive from the housing, you must first pry off the plastic shell from the metallic HD casing. Simply insert a thin knife and slowly "saw" away at the adhesive. Shortly after you will be left with the following: [ Register or Signin to view external links. ] Once this is done, you can simply remove the attached Serial ATA data cable from the HD and slide out the drive. [ Register or Signin to view external links. ] [ Register or Signin to view external links. ]