I have no answer for why your sim gets deleted, but follow these instructions to put your Packages folder in a custom location, and then if it happens again, you will have FAR less than 120 Gb to redownload.
I have no answer for why your sim gets deleted, but follow these instructions to put your Packages folder in a custom location, and then if it happens again, you will have FAR less than 120 Gb to redownload.