2.5" 3.5" HDD adapter

thingiverse

Insert a 2.5-inch HDD into a Trayless Mobile Rack using this adapter. Simply print out the adapter, attach it with two screws, and you're ready to use your hard drive right away. If your hard disk is 7mm thick, however, you'll need an additional component called "entretoise" along with some double-sided tape to ensure a secure fit. Once you have everything in place, start enjoying your upgraded storage solution.