Disassemble Seagate External Harddrive Enclosure

Step 3 Remove the Unit From the Remaining Casing

Now you can see the metal shielding that presumably covers the controller board for the hard drive. You can open this if you want, but it's not necessary to remove/replace the hard drive.

Now, let's take a look at the sides. There are three screws total, though four holes, so your model might be different. You can take these screws out now if you want (they are normal Phillips screws) but don't try to remove these plastic sidings just yet.

What you need to do now is pull the back of the case a bit and pull up on the back of the main unit. Your power switch, USB and firewire ports should just clear the space. When you do this, be aware of the plastic legs that go up through the side plastic panels. Next, you want to slowly and carefully wiggle the front of the unit out. Once the unit is free of the other half of the outermost casing, you'll see why you didn't take off the plastic side panels yet. You will now have access to the hidden screws that you couldn't reach before. Go ahead and take out all these screws, and peel off these plastic side panels. They are adhesive, but not so much that any force will be required.