Once you find the exact byte where you know the storage ends, you can actually format the drive it's completely usable. F3 can do this with f3probe and f3fix.

Once you find the exact byte where you know the storage ends, you can actually format the drive it's completely usable. F3 can do this with f3probe and f3fix. https://fight-flash-fraud.readthedocs.io/en/latest/usage.html#how-to-fix-a-fake-drive https://fight-flash-fraud.readthedocs.io/en/latest/usage.htm... I've used it on a 2GB microSD that came with a 3d printer that turned out to be 100MB. I continued to use it to transport files to my 3d printer for a bit with this.