My computer has started acting sluggish of late, WELL it has been going on as Ive started loading more programs into memory. So Im sure it has to do with the amount of RAM, I only have 128MB, and I want to increase it to LIKE say 512MB or even to 1GB. How would I go about doing that?

Also I want to increase my HD capacity. Right now I have 20GB, and Im thinking of either getting a bigger HD (320GB) and putting it in, or getting an external HD (500GB). What are the PROS and cons of having an internal HD vs an external HD
Go to www.crucial.com, enter your computer brand, and model, and it'll TELL you what RAM you need.
With 20GB HD, I'd replace it with bigger (internal) drive. You don't have much room to play with 20GB.yes i am going to replace it with a bigger drive. As to getting the drive or knowing what to get, its a no brainer. Theres only one kind of internal drive. But, short of being able to see the manual for my computer, which I dont have anyway, how do I find out what kind of RAM my computer uses, cause I know there are different types of RAM modules.

So what me do?
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Go to www.crucial.com, enter your computer brand, and model, and it'll tell you what RAM you need.