An error occurred while accessing '3GBFREE', the system responded: The requested operation has failed: Error mounting /dev/sdb2 at /media/oleg/3GBFREE: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,dmask=0077,fmask=0177" "/dev/sdb2" "/media/oleg/3GBFREE"' exited with non-zero exit status 13: ntfs_mst_post_read_fixup_warn: magic: 0xffffffff size: 4096 usa_ofs: 65535 usa_count: 65534: Invalid argument Actual VCN (0xffffffffffffffff) of index buffer is different from expected VCN (0x3). Failed to mount '/dev/sdb2': Input/output error NTFS is either inconsistent, or there is a hardware fault, or it's a SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows then reboot into Windows twice. The usage of the /f parameter is very important! If the device is a SoftRAID/FakeRAID then first activate it and mount a different device under the /dev/mapper/ directory, (e.g. /dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation for more details.