This is a modular hdd holder. They are inter-lockable and you can stack them. They will accommodate full size HDD and the smaller laptop sizes too.
Please add some photos of your builds of the projects to the thingiverse page.
PLEASE VOTE FOR THE INSTRUCTABLE IN THE 3D PRINTING CONTETST
Step 1: Download 3D Models
i have uploaded all of the files to the thingiverse link below.
Step 2: Print
I recommend using an infill percentage of about 20-25% as it may be holding some weight.
If you don't have a 3D printer, I recommend services like 3d hubs.
Here is my 3D Hub: https://www.3dhubs.com/middlesbrough/hubs/conorm125
Step 3: Assemble
Now you can just click the parts together to assemble them.
Step 4: HDD Saftey
HDD and SSD, are like other computing comments and are sensitive to static. I recommend placing your hard drives into anti static bags to ensure you don't break them. These usually come with electrical components for computers.
Step 5: Optional Extras
I have added some files to the thingiverse page. these allow the hdd to be mounted to a wall.