Do not rely on Windows File Explorer, as it reads the hacked firmware. Instead, use these open-source tools: 1. Test Capacity with H2testw (Windows)

SData Tool utilizes a sophisticated data compression and sector management technique. When a user activates the tool on a drive, the software interacts with the controller of the USB or SD card. It adjusts the storage reporting logic, allowing the drive to store more data by optimizing how the bits are placed on the storage sectors. This process effectively "unlocks" hidden or inaccessible areas of the drive's potential capacity.

If you have already used this tool and want to restore your drive to its original, stable capacity, you can use the built-in Windows utility to wipe the fake configuration: