To mount a NTFS-Partition check the right Driver is installed with this command:
sudo apt install ntfs-3g
If its installed, it will inform you. If not, then it will be prompt installed.
Make a new directory to that the Partition will be mounted.
sudo mkdir -p /mnt/ntfs
(chmod -R 777 /mnt/ntfs
)
Now mount the Partition with this command:
sudo mount -t ntfs /dev/sdb1 /mnt/ntfs
cd /mnt/ntfs
Thats all.