Hello friend,
Doesn't works ...the same problem.
from some recommendations on the forums...I made this process :
dennis@dennis-SATELLITE-C850D-11R:~$ sudo dosfsck -r /dev/sdb
fsck.fat 3.0.26 (2014-03-07)
Currently, only 1 or 2 FATs are supported, not 251.
What do you think ?