How can I get a "TOSHIBA EXT" USB Drive to mount?

The trouble began when I was using Xfe File Manager to copy 2 GB of picture files to the "TOSHIBA EXT" USB disk on my Ubuntu 18.04. The copying processingslowed to a crawl after copying 1.8 GB. After about an hour, the size of files copied had barely changed, I cancelled the process. I was going to shutdown the computer and noticed the light on the Toshiba disk was still blinking so I decided to wait. Shortly after, the power to my house went off.

When I started the computer, the Toshiba drive did not mount and was not listed in Xfe File Manager. I opened Files (Nautilus) and the Toshiba drive is listed in Files but is not mounted. I used properties to try to mount it but it will not mount. I used "Safely remove disk" to shut the Toshiba drive down and shutdown the computer. Waited 30 seconds and rebooted the computer.

This did not change anything.

I know the computer is communicating with the "TOSHIBA EXT" drive because the the light on the drive blinks and goes on and off all the time the computer is running. Plus it is listed in Files, Disks and other places.

Following are links to websites I have looked for help and followed many of their suggestions. All of which did not mount the "TOSHIBA EXT" drive.

Even though this is for ubuntu 14.04, I figured maybe the "Disks" program would be updated on Ubuntu 18.04 and might work ...

I tried using "Disks" to setup the code to mount it in the /etc/fstab file. That code did not work to mount it. It did add this code to the file:

/dev/sdc1: LABEL="TOSHIBA EXT" UUID="BA42DA8242DA4335" TYPE="ntfs" PARTUUID="88fa34b8-01"/dev/disk/by-id/ata-TOSHIBA_MQ04UBD200_39JET9F6T-part1 /mnt/ata-TOSHIBA_MQ04UBD200_39JET9F6T-part1 ntfs nosuid,nodev,nofail,x-gvfs-show 0 0

The /etc/fstab file also has this code for a Seagate USB drive which does mount:

UUID=382bc1ca-a70a-4212-bb91-362c48d82a8e /               ext4    errors=remount-ro 0       1/swapfile                                 none            swap    sw              0       0

I used this code to get UUID of a disk drive:

rob@rob-MS-7721:~$ sudo blkid | grep UUID=[sudo] password for rob: /dev/sda1: UUID="382bc1ca-a70a-4212-bb91-362c48d82a8e" TYPE="ext4" PARTUUID="07f967cf-01"/dev/sdb1: LABEL="Seagate GoFlex" UUID="BEB8C0D6B8C08DF9" TYPE="ntfs" PARTUUID="11ca0efb-01"/dev/sdc1: LABEL="TOSHIBA EXT" UUID="BA42DA8242DA4335" TYPE="ntfs" PARTUUID="88fa34b8-01"

I ran: man mount - and took a shot at this:

sudo mount --source /media/rob UUID=BA42DA8242DA4335 --target /media/rob

The above did not work.

Following this article on file permissions:

rob@rob-MS-7721:~$ ll /media/$USERtotal 48drwxrwxr-x+ 3 root root  4096 Oct 15 18:56  ./drwxrwxr-x  5 root root  4096 Oct 15 14:39  ../drwxrwxrwx  1 rob  rob  40960 Mar 24  2021 'Seagate GoFlex'/

The above shows the owner as "root" on what would be "TOSHIBA EXT" while I am listed as the owner on the "Seagate GoFlex”. I cannot change the ownership because the disk is not mounted.

Next, I ran this code:

rob@rob-MS-7721:~$ sudo mount -t auto /dev/sdb1 "/media/rob/Toshiba Ext"Mount is denied because the NTFS volume is already exclusively opened.The volume may be already mounted, or another software may use it which could be identified for example by the help of the 'fuser' command.

I ran: fuser -m "/media/rob/TOSHIBA EXT" -m /media/rob.

This returns a bunch of numbers. None of which look familiar.

I changed /etc/fstab file to have this mounting code:

UUID=382bc1ca-a70a-4212-bb91-362c48d82a8e /               ext4    errors=remount-ro 0       1/swapfile                                 none            swap    sw              0       0/dev/disk/by-id/ata-TOSHIBA_MQ04UBD200_39JET9F6T-part1 /mnt/ata-TOSHIBA_MQ04UBD200_39JET9F6T-part1 auto nosuid,nodev,nofail,x-gvfs-show 0 0

The Toshiba disk has always been plugged into a USB3 port.

I am running Ubuntu 18.04 on an AMD® A4-5300 apu with radeon(tm) hd graphics

Can anyone tell me how to get the "TOSHIBA EXT" USB drive to mount?