Scanning Takes Longer Each Time

When Bitdefender scans my computer, it takes longer each time, because it creates a folder for every day it updates, and each folder contains 929 update files (30 MB). When I first scanned my computer, it took about 2 hours - now several months later it takes 6-7 hours because of this.


I thought it would just overwrite my existing update files, but it doesn't.


Also, I don't have unlimited hard drive...:-)


Is it supposed to make a new folder for every update?