How to add an NTFS based USB memory stick to a Raspberry Pi
Plug in the USB stick to the usb port
sudo apt-get install ntfs-3g
sudo mkdir /mnt/usbdrive
sudo fdisk -l
The last command should show you something like this at the bottom
/dev/sda1 8064 241339391 120665664 7 HPFS/NTFS/exFAT
Then run
sudo mount /dev/sda1 /mnt/usbdrive
sudo nano /etc/fstab
Paste this in to the above file
/dev/sda1 /mnt/usbdrive ntfs-3g rw,default 0 0
That should be it. Reboot the Pi and hopefully it should work