This is the exact commant to run:
sudo ntfsfix -b -d /dev/sda1
Still, if you are unable to fix the problem, ntfsfix might help fix the partition. The ntfs-3g package contains the ntfsfix utility (which usually comes preinstalled). If not, you can install it using:
sudo apt install ntfs-3g
Then try to fix the partition by running the following command:
sudo ntfsfix -b -d /dev/sdxx
The -b flag tries to fix bad clusters and -d to fix dirty states. In the above command you have to change the sdxx partition based on your system.
In your particular case, the 634 GB Volume is /dev/sdb1 as displayed in the screenshot you provided, so the command you should run is:
sudo ntfsfix -b -d /dev/sdb1
https://askubuntu.com/questions/1518719/unable-to-access-external-drive-24-4
#neverforget
