Files, hardware assembly, 3d printed cases, and software setup for this project can be found on our Github page :https://github.com/thinklearndo/keychainbackup
I wanted to create a file backup system that would allow me to take my data everywhere with me, on an encrypted thumb drive.
You shouldn't put that much weight on a USB connector. The ports and the drives are not designed for that type of load.
Possibly install longer cup hooks and move the USB port to the bottom of the hanger to allow you to hang the keys on the hook while also allowing the USB to be plugged in.