I have a 8GB USB drive that displays only as 200MB. I have to run diskpart as an Administrator from my Windows 10 computer. I selected the disk, and then cleaned it. After that, go back to disk management, and then reformat the entire partition to FAT32. USB drive is now showing 7.9GB.
Here’s the fix.
I often have this issue with different USB memory.
A lot of it comes from testing and using them on Linux for my Raspberry Pi adventures.
I have become a huge believer of SD Formatter. It has a resize option that works a treat.
https://www.sdcard.org/downloads/formatter_4/index.html
Thanks. Nice tool. I almost gave up on a thumb drive. I have a few drives needing revival.