I had a situation were I had to move the computer from where it was. I turned off the computer and just disconnected every USB including the Hard Disk. Informations:
- My Drive is plugged
- I am trying to use my HD back again, off course, without loosing the files I already had.
- I have tried to do sudo fsck /dev/sdb and it didn't work, I am now going to try chkdsk In windows.
- I discovered that this drive is a NTFS (chkdsk is still loading).
- CHKDSK is done, Windows showed this message in the cmd "It showed the text: "Windows verified the system of archives and did not find any problems" (translated from portuguese)."
- chkdsk in terminal of ubuntu shows error message inside terminal "chkdsk: command not found
".
Now the Hard Disk is on and it is appearing in the Disks application. When I open the Disks application I only have these options available:
"Format Partition..."
"create Partition Image..."
"Restore Partition Image..."
"Benchmark Partition..."

Contents are appearing as unknown!
sudo fdisk -l
lima@Lima:~$ sudo fdisk -l
[sudo] password for lima:
Disk /dev/sda: 111,82 GiB, 120040980480 bytes, 234455040 sectors
Disk model: WDC WDS120G2G0A-
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: CC468874-3D11-4188-B15B-A6C133003A42
Device Start End Sectors Size Type
/dev/sda1 2048 1050623 1048576 512M EFI System
/dev/sda2 1050624 234452991 233402368 111,3G Linux filesystem
PS: I am going to edit the question instead of responding in the comments, thank you.
I just installed GParted in my Linux Ubuntu computer and a error message appeared.
here is a picture of the error message
I pressed "Cancel" and this is what appeared.