Cant't see files in external hard drive

could yo give more info please.
please run:

1.unplug drive
2. tail -f /var/log//dmesg
3.plug drive
4.sudo fdisk -l

When you unplug the drive from Windows do you use the safe remove feature in the OS before unplugging it or do you just pull it out?

Have you ran a chkdsk on the partition in Windows to make sure that the data is consistent and correct?

What filesystem is the drive formatted to?

Hi,
More information:

$ tail -f /var/log//dmesg

[ 23.660357] Bluetooth: BNEP socket layer initialized
[ 23.968241] init: cups main process (850) killed by HUP signal
[ 23.968248] init: cups main process ended, respawning
[ 24.608675] audit: type=1400 audit(1427391198.312:17): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/lightdm/lightdm-guest-session" pid=925 comm="apparmor_parser"
[ 24.608682] audit: type=1400 audit(1427391198.312:18): apparmor="STATUS" operation="profile_load" profile="unconfined" name="chromium" pid=925 comm="apparmor_parser"
[ 24.608875] audit: type=1400 audit(1427391198.312:19): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="chromium" pid=925 comm="apparmor_parser"
[ 24.609103] audit: type=1400 audit(1427391198.312:20): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/sbin/dhclient" pid=927 comm="apparmor_parser"
[ 24.609112] audit: type=1400 audit(1427391198.312:21): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=927 comm="apparmor_parser"
[ 24.609117] audit: type=1400 audit(1427391198.312:22): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=927 comm="apparmor_parser"
[ 24.609679] audit: type=1400 audit(1427391198.312:23): apparmor="STATUS" operation="profile_load" pr
.............................................................................................

$ sudo fdisk -l

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xe548186c

   Device Boot Start End Blocks Id System
/dev/sda1 1 1953525167 976762583+ ee GPT
Partition 1 does not start on physical sector boundary.

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x579a6f5f

   Device Boot Start End Blocks Id System
/dev/sdb1 2048 1953521663 976759808 7 HPFS/NTFS/exFAT

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About when I am using in windows I never use safety remove I tried chkdsk toghter with safety remove but the situation is the same
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Thank you !

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