@chalaaa03 Try searching your computer for any stray saves. Open a File Explorer window, click This PC in the left panel, and enter Slot_ in the search field in the upper-right corner. If the search finds any saves, select one and click the "Open file location" menu button, and you'll jump to where that save is, which will hopefully be where the rest of your missing content is as well.
If you find any saves or other content, you can move the files back to the appropriate subfolders within the Sims 4 user folder. But make sure you're viewing the correct folder in the first place, as in, the one the game is reading. Here's how to find its location:
https://sims4.crinrict.com/eng/2018/07/how-to-find-your-user-folder/
If you want to see the full file path of any file or folder, right-click it and select Properties, then look for the Location in the General tab.
I don't know why your backups would disappear from your flash drive unless you were using some program that syncs data automatically.
thanks for replying. i tried doing what you recommended and nothing was found. i have OneDrive which i already tried searching and there was nothing as well.
@chalaaa03 Then I'm sorry, but it sounds like your content is gone for good.
I know it doesn't help now, but this is why it's so important to make frequent backups of your saves or anything else you'd be upset to lose. (And that goes for data in general, not only Sims 4 content.) You never know when a computer issue will wipe your data, or at least some of it, and backups mean you'll never be in danger of losing everything.
