A simple case to mount your Pi and a SATA hard drive for use as network attached storage solution. Designed to fit over the top of an Ikea Smahagel USB adapter (https://www.ikea.com/gb/en/p/smahagel-3-port-usb-charger-white-40539183/) so that there are enough USB ports to power the Pi and the hard drive via a SATA adapter like this one: https://ebay.us/m/2BNRzQ
There are two versions of the main case, one of which has 2mm more space above the Pi for the lid to slide in. I used the regular one but had to push the lid on rather than slide it.

Prusa

I3 MK3S

No

Yes

0.2mm

5-15%

I printed this at 200mm/s with one wall and 5% infill to get it done quickly but better to use 3 walls and 10%. Took about 2 hours with my setting but 6.5 with more sensible ones for a stronger result. Organic/tree supports are needed to support the clips that stick out but gave no trouble in printing. I used Prusa Slicer paint on supports to only support that part. Stand it up with the closed end on the bed for best results - it should load into the slicer that way by default. Any PLA filament is fine. The clips are quite strong in the recommended orientation.

Other components needed:
4 M2.5 heat set inserts
4 M2.5 x 8 screws (for the Pi)
4 M3 x 8mm screws for the hard disk
SATA to USB adapter as noted above

The extra USB port on the adapter is needed because some PIs can't supply enough current to power a hard drive.
Instructions to build the NAS can be found here:
https://www.raspberrypi.com/tutorials/nas-box-raspberry-pi-tutorial/
The instructions are pretty good except that you need to create the directory you are naming as the drive mountpoint before actually mounting it.