I can only confirm that this works on SanDisk Clip Sport devices. You might be able to use that guide for other devices based on ATJ212X SoCs, but you are on your own.
This guide instructs you to run unverified code from arbitrary GitHub repositories, including as root. You should use
a system that you aren't afraid to brick. You can use a VM with USB pass-through, though I YOLO'd this on a physical
machine.
This guide will erase your data on the SanDisk Clip Sport, if that device is functional, so if you want to backup the