Re: Does EA account really save all progress?
@Lindy086 Unfortunately, your Sims 4 saves are only stored locally, not anywhere on EA/Origin servers. Specifically, all your user data is in Documents\Electronic Arts\The Sims 4: saves are in the saves folder, saved households and builds in Tray, etc. If you don't have a recent copy of this folder, you're probably out of luck.
There's always a chance that the Sims 4 folder was synced with OneDrive, so you can try looking there. And you can search your hard drive for Slot_* (with the asterisk), which will turn up any other saves you might have somewhere. But it sounds like either one is probably a long shot.
I'm sorry this happened, but it is unfortunately a real risk with computers. In the future, you may want to save the Sims 4 folder, or at least the saves folder, to an external storage device or cloud storage service from time to time, so you don't lose everything if you have another serious system issue.