Single Drive DATA Recovery for Dummies - Buffalo Linkstation Pro

(This process is explicitly for a Buffalo, but will work for any single drive external storage device.)
(If your drive has 2-4 drives in a raid configuration, well, that answer is MUCH harder, email me and I could write up what you "need", but it is so much harder and annoying.)

1) remove the drive from the case
(if you cant do this, are afraid, dont own a screw driver, are worried that you will break it, well, you need to pay someone to do it for you)

2) external cable - buy one of these - they are dirt cheap and you will use them over and over
http://www.amazon.com/gp/product/B000UO6C5S

3) plug your drive in (cables are pretty fraking trivial)

4) download
http://www.diskinternals.com/linux-reader/ - just read the drive
http://www.diskinternals.com/linux-recovery/ - read and recover files
http://www.diskinternals.com/ntfs-recovery/
http://www.diskinternals.com/partition-recovery/

most/a lot of the external NAS devices use linux,
5) try the linux version first,
6) if that doesnt work try the ntfs version
7) if that doesnt work try partition recovery, but now things are getting ugly

If you need help using this software, read what they have on their website.