Why does a restore point in Win XP swell?

[pass2870]

I happened to notice the free space on my XP system disk goes down. After cleaning unnessesery files, cookies tempor Internet files, junk files etc. I came to conclusion the clean up gives dimes (kylobytes). Then I revealed the size of a restore point to swell. A restore point initial size in my case is 30 mB (17 on disk). After 3-4 days of work it goes up to 300mB. I do not follow what happens. Should something wrong be with my system (though nothing wrong happens) a new RP must be created.
Anybody can help?
Pavel

 

[Hawkeye22]

There are multiple restore points. You can adjust the amount of drive space that is reservered for restore points.

http://www.ehow.com/how_5828422_restore-point-space-allocated.html