I've had this before, when the USB was formatted as a Linux install. Most likely that the drive isn't formatted correctly. In Windows 10 File Explorer, you should be able to right click on the drive and format it to ExFAT for general file use (this will erase what is on it). This could also be happening due to damage to the drive. It would help to know what the drive was used for before this happened.

Whatever you can get your hands on, so long as it isn't too old. Friends and family may be willing to provide their old devices. Used markets vary by region, here in Australia I use Gumtree and FB marketplace. Let me know how you fare!