Open up diskpart via CMD in an elevated command and see if you can perform the following:
Right click CMD
Run as Administrator
type diskpart, hit enter
type list disk, hit enter
type select disk x(which is your USB drive), hit enter
type clean, hit enter
type select partition primary, hit enter
type select partition 1, hit enter
type active, hit enter
type format fs=NTFS QUICK, hit enter
type assign, hit enter
type exit, hit enter
mind you this will format the drive if you have any data onboard, other than that, the drive looks like it's ran it's course.