How can i find more memory for my laptop?

i own a laptop with 40gb hdd, i with the sole purpose use it for school but i want more memory or space in my system, the c and d drive are below 50% i enjoy cleaned out unused programs and files and have defragmented the system but still shows both drives below 50 %, what can i do to seize more memory for my laptop? am not a computer knowledgeable being, can someone help?

Answer:
http://support.microsoft.com/default.asp...
Description of the Disk Cleanup Tool contained by Windows XP
well unlike a laptop u cant upgrade your laptop or add memory to it. so will merely have to do what you've be doing and try to find and programs or files u really dont need and delete them. and if u own music or videos on your laptop u might want to delete those they pocket up alot of space.
You can buy laptop hard disks from various computer parts retailers.
You can buy external hard drives that are portable and plug into your USB port such as http://www.novatech.co.uk/novatech/specp...

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