Need more space so it is time to get another hard drive. Should I get an internal because my computer will hold two, or should I get another Western Digital external. Are internals hard to install? Is one better than the other or is it really just a matter of preference.

internal will be faster data transfer. plus you don't need another AC plug.
If you have space, and don't need to be able to connect the drive to another computer, then I'd say go for internal.

It's not hard to install, though it might depend on your PC, some are a pain, some are very easy.

get a 1tb sata2 internal driver

if you can afford it
anyway, its not that expensive when compared to the 500gb and 750gb

Thanks for the input, I was leaning towards an internal and I think that I have been pushed over the edge. The 1 tb is tempting, but I will probably get a 320 or 500gb. The internets say that it should be an easy install for my computer.

i got two 750 gigs internals, best move i made in years