In Sims 3, what the hell is the "simCompositorCache.package" and what

Hi guys! I'ved recently installed sims 3 last week with no troubles on it like crashes etc. But i have DeepFreeze installed on my pc on the disk partition "C:" (see i got two partitions, "c:" for programs and the 2nd one is "D:" for files and gaming). But since the default save location of sims 3 is in My Documents which is in drive C: and everytime i am finished playing it, i have to move the "Electronic Arts" folder to drive D:for backup and next use after shutdown (because DeepFreeze deletes it after restart). when playing again i have to move the save to My Documents for resume and evry time i play sims 3, the save gets larger and larger (93mb to 600mb) resulting a slower transfer of d saves from D: to C: and vice-versa. And the file that causes this is that damn "simCompositorCache.package"! what the hell is it? what does it do to my progress in sims 3? i would just like to know so that i would have know what is the value of that damn file!