Extend my Computer Memory

I love taking photographs and I have thousands uploaded in this laptop of mine and now the computer memory is running out. I am thinking of getting a new desktop especially that one of my friend said that I get most of the money back during the tax refund. That will be nice. I'm sure my kids will like it. For the mean time I need to get one to extend the usage of what I've got now and I already found a cheap one from buy.com.