3.5'' HDD Project Mount

thingiverse

Here's an easy build that mounts a regular 3.5-inch hard drive disk and secures it to the wall or case with four screws at the back. The hard drive is intended to be mounted upside down with its circuit board facing up. It comes with a thin 3 millimeter acrylic piece and fits a standard 3.5-inch hard drive, which requires just four screws.