If you are using an NTFS drive and it will not mount, then install the ntfs-3g package if it is not already installed. If you are not comfortable modifying fstab, then you can mount the drive manually.
You can use a command similar to below to mount your NTFS drive:
sudo mount -t ntfs-3g /dev/sdXY /mnt/ntfs-junk
You can use the command sudo blkid -o list to find your NTFS drive's designation to substitute for "XY" in the above command. Please post the output of the blkid -o list command.
Then substitute your NTFS drive's designation into the command. For example if your NTFS drive is sda1 then the command to use would be:
sudo mount -t ntfs-3g /dev/sda1 /mnt/ntfs-junk
YMMV, but you at least won't need to modify fstab to try mounting your NTFS drive this way. If the drive you are having issues accessing is not formatted as NTFS then you can disregard all my prior posts.