[deanhills]

I totally agree with @"Hidden Refuge".  What I'd also try is look at a second hand hard disk that is compatible with your laptop since you want to use it as the primary hard disk.  Like maybe if you went to one of those laptop technicians  they may have old laptops they can harvest for hard disks at a reduced price.  It has to be a reliable and honest technician however of course.  If he doesn't have the exact same as you have on your laptop, and he is a good laptop fixer, he may be able to recommend something cheap but at the same time good quality for a replacement that will work well with your laptop.  He may even be able to fix it for you, as changing hard disks in laptops can be tricky as well.

I'd be careful with online shopping as there is so much that can go wrong when you buy new equipment for a laptop online.  Unless it has a very good reputation and the product matches your laptop exactly, online shopping from a very large vendor like the one you're planning could be a frustrating experience for you.  Better to make friends with a reliable laptop fixer who lives near you and whom you can trust.