Format USB pen drive with FAT filesystem
Formatting a USB pen drive (USB stick) or any other removable media to use FAT/FAT32 is easy. Warning: All data residing on the media will be lost.
To reformat the drive Right-click on the USB stick in the explorer window and select Format...
The Format dialog will open and you only have to make sure that FAT32 (Default) is selected for the File System. Then hit Start. Acknowledge the warning that all data on the media will be deleted with Yes.
After this, your USB drive or storage medium can be used normally again.