Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:1368294.

I work in IT. Every year we replace old computers, and scrap parts for backup. So we have a bunch of extra 2.5" HDDs laying around the office. So I decided to design something to keep them organized. This will comfortably hold 9.5mm 2.5" HDDs, the 7mm are slightly loose. This also means it won't fit 2.5" HDDs that are 12.5, 15, or 19 mm.

After printing and putting them in, I found the magnets in the hard drives kind of pull them together at the top. Nothing terrible.