Bonus content that came with Limited Edition versions of the game might be a problem if your EPs aren't marked as LE. Look in your "my games" tab in Origin to see if they are coded correctly. If not, you need EA to change that. You can have them find the items in your Purchase History as proof that you did have the codes.
The other issue is that latest store patch that shows up in your contentpatch folder as a package file. Apparently you can't download that from the store anymore; but if you have it in an old sims 3 folder, you can copy and paste it in. If not, search the internet to find where old patches are archived on the internet. Here's one:
https://forums.thesims.com/en_US/discussion/933285/launcher-no-longer-installing-store-updates
I think these items and premium content ones are particularly sensitive and might need the dcbackup file retained when you eventually can reinstall them.
Good luck @Goodywood and @Sorceress!
