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Error mounting /dev/sda4 at /media/lubuntu/Storage: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=999,gid=999,dmask=0077,fmask=0177" "/dev/sda4" "/media/lubuntu/Storage"' exited with non-zero exit status 12: Failed to read last sector (1764771839): Invalid argument

HINTS: Either the volume is a RAID/LDM but it wasn't setup yet,

   or it was not setup correctly (e.g. by not using mdadm --build ...),

   or a wrong device is tried to be mounted,

   or the partition table is corrupt (partition is smaller than NTFS),

   or the NTFS boot sector is corrupt (NTFS size is not valid).

Failed to mount '/dev/sda4': Invalid argument

The device '/dev/sda4' doesn't seem to have a valid NTFS.

Maybe the wrong device is used? Or the whole disk instead of a

partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?