Helping people with computers... one answer at a time.
Lots of files on your computer is not going to slow it down. There are several other factors to look at that may be causing your performance issues.
I have many pictures and videos stored in the My Pictures section of my computer and my computer's gotten pretty slow. I believe that the photos are the problem. I guess even if I do not have My Pictures open, they are still using up space making my computer run slow.
I have Windows XP, IE8 and I'm running Microsoft Security Essentials plus Spybot, they never show any viruses. I guess if I took all of my pictures out of my computer would it run faster even if I'm not using them? Also, what happens to all of my deleted files such as browsing history? Even though I delete them nightly do they still keep piling up taking up space in my computer and slowing it down? Wouldn't our computers finally become unusable even though we delete all of our files and cookies, etc.? Is there anything we can do about that?
In this excerpt from Answercast #27, I look at a common misconception – that a lot of files on your computer will slow it down.
So, there's a big misconception in the question here. Having files on your computer that you do not use, such as your pictures, or your browser cache, or your history, or whatever, does not slow your computer down.
What slows your machine down are things like:
Too much software that's running
Hard disk problems (in other words, an error or bad sector on your hard drive can cause it to appear slow)
Not having enough RAM in your computer can definitely make it run more slowly (and that's in companion with that concept of trying to run too much software on your machine at once.)
The fundamental question that you're asking here is, "Will having too many pictures on your machine slow it down?"
Put as many pictures as you want in your machine. There is no reason to
worry that the number of files on your machine will slow it down. If your
machine is slowing down, it's slowing down for other reasons.
Next from Answercast #27 – How do I make checkboxes work on the web?