Re: Why did my sims 4 game reset everything with the latest update
@prince048633 What this sounds like is that you have an entirely new Sims 4 user folder. This can happen if Origin switches you to the Sims 4 Legacy Edition, which uses its own folder, or if the existing user folder is removed from Documents\Electronic Arts. The most common cause of that is OneDrive uploading the folder to cloud storage and simultaneously removing it from your hard drive.
Please check OneDrive for a Sims 4 folder, and for any saves inside. If you find some, you can move them back to the Sims 4 folder on your hard drive, and they should work, provided OneDrive hasn't changed their names. (If you do find saves but can't get them to load, let me know, and post a screenshot of the saves folder.)
If OneDrive is in fact the culprit, you can disable its automatic syncing of Documents. You'd still be able to manually upload, but OneDrive wouldn't mess with your files on its own.
However, the only surefire way to prevent this kind of data loss is to have a backup copy of the user folder, or at least the saves folder inside. You can periodically upload it to cloud storage (Google Drive, Dropbox, etc.), or copy it to an external hard drive or USB stick, and then if your data ever disappears again, you can just restore the backup.