What is the cheapest way...

What is the cheapest way to upgrade my hard drive. I am looking for a 250gb and also I dont want to spend too much. Any advice would be apreciate.

You can always check up electronic liquidation places.

Tiger Direct.com is one of them

Try tiger direct as Denji said

Try to found on Amazon.. Good deals recently!

I mean, should i do it the external hard drive wayto backup or is here any oher way?