1. Find the UUID of the partition you want to mount
sudo lsblk -f
2. Now make a copy or note of the partition

3. Create mounting folder somewhere on the drive like /mnt/drive
sudo mkdir /mnt/drive

4. I also will change rights so desktop user will be able to make changes
sudo chown -R user:user /mnt/drive

5. Open fstab .. if you want to learn more about fstab ( See this page )
sudo nano /etc/fstab

6. And add this line to it if it is ntfs
UUID=13333UUIofYourDrive /mnt/drive ntfs defaults 0 2