The disk contains an unclean file system (0, 0)
This problem occurs with an unexpected shutdown of a disk with NTFS partition (in this case with /dev/sda8) Error mounting /dev/sda6 at /media/dragonx/BACKUP: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000" "/dev/sda8" "/media/dragonx/BACKUP"' exited with non-zero exit status 14: The disk contains an unclean file system (0, 0). Metadata kept in Windows cache, refused to mount. Failed to mount '/dev/sda8': Operation not permitted The NTFS partition is in an unsafe state. Please resume and shutdown Windows fully (no hibernation or fast restarting), or mount the volume read-only with the 'ro' mount option To solve this, just execute the following command: sudo ntfsfix /dev/sda8 Where /dev/sda8 is the disk with problems