- There are more than one partition in the U disk made as a system disk. If you want to restore it to a regular U disk, follow this operation to achieve success:
https://baijiahao.baidu.com/s?id=1721553784320827163&wfr=spider&for=pc
https://baijiahao.baidu.com/s?id=1721553784320827163&wfr=spider&for=pc