I have 3 External 2.5" HDD (Western Digital) that are always laying around separated. I decided to make this holder that I can always have them 3 together.
2 HDD with dimensions 82 x 110 x 22 mm
1 HDD (middle) with dimensions 82 x 110 x 12mm
Solidworks project is provided so you can easily change dimensions to your HDDs size.