I never heard of cc doing this on it's own? That's extremely weird. Are you sure you are not accidentally downloading duplicates? It's very common to end up with multiple duplicates and in one discord someone had over 5000 duplicate files. I'm at the point where I have so much cc that every time I downloaded new cc I have to use programs to check for duplicates and I always end up with some to delete.
Only other thing I can think of if you are absolutely sure that they are randomly making copies, is to delete or disable your overdrive if you have that.
That causes a lot of problems with putting back stuff you deleted or just doing weird things and I had to delete mine. You can research it and see if it might be causing your issue.
