How to increase memory/ Disc space on computer?

Ok. So I bought a computer game and while downloading it, I was told that I did not have enough memory for a complete download. Also lately I've been receiving messages on my laptop saying that I am running low on disc space. I was wondering if these problems are similar and if so, how might I go about... show more Ok. So I bought a computer game and while downloading it, I was told that I did not have enough memory for a complete download. Also lately I've been receiving messages on my laptop saying that I am running low on disc space. I was wondering if these problems are similar and if so, how might I go about increasing the memory/ disc space of my computer? Is there something I need to buy/ should I send in my computer for more RAM? I have a Vista... if that means anything xD I am kind of a fail with computers.

Thanks in advance for any help :]
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