Save's Dissapeared

CrazyChloe2003​  It sounds like the saves are not in the folder the game is currently reading; this location may have changed after a Windows update.  So please check the folder the game is reading and compare it to the location of your saves.  Here's how to find the folder:

https://sims4.crinrict.com/eng/2018/07/how-to-find-your-user-folder/

If the saves are in fact in exactly the right location, they may not be named correctly.  In that case, please post a screenshot of the contents of the saves folder, as in, I'd like to see the names and dates.