Summary

This is a frame designed to securely hold a standard 3.5" floppy disk and allow said disk to be hung from a lanyard. It uses notches present on most (if not all) floppy disks as a way to positively click the disk in place and not allow it to fall out.

• Can be printed in PLA or PETG, though I haven't tested longevity with either. I assume PETG is more durable, but the retention works with both!
• I printed it with tree supports and only on build plate; any significant drooping would cause interference fit problems. You can try printing without, but I didn't want to waste plastic.
• Does not stress the disk in any way while in place. The retention mechanism does not use friction; it uses notches already present in the disk itself locating with slight bumps on the frame.
• Following along with the above, this only supports inserting disks with the shutter facing downwards. You can put a disk in with the shutter facing up, however the retention mechanism will work via friction instead of clicking, meaning you could damage your disk over time. Or, you could redesign the frame using the STEP/FCStd file!
• Most, if not all, 3.5" disks should be compatible.

I used the specs outlined in ECMA 147 to obtain the exact size and location of the notches used for the retention function. Technically, according to the standard, these notches are optional, however I have never seen a disk without them myself. I have tested the frame with many different disks from many different manufacturers, and all fit perfectly.

As for why I made this in the first place? Someone drew some art on a floppy disk for me and I wanted a way to display it safely, since looping a lanyard through a write protect hole can (and did) lead to breaking the disk. Art is by Anubis Studios!

Why "Redux" in the filenames? Cuz I had an older, unreleased version of this frame using a different retention mechanism which ended up damaging disks. This version does not damage disks, so that's nice!