katgurl72 It sounds like either you put the saves in the wrong location, as in, not the user folder the game is currently reading; or the save names are in an unreadable format. For the first, please confirm that the saves are directly inside the saves folder, not in a subfolder. Then go into the game and find the full path to the user folder, as described here:
https://sims4.crinrict.com/eng/2018/07/how-to-find-your-user-folder/
And confirm that the path to the saves is exactly the same up to the Sims 4 folder itself. To see the full path to the saves, right-click one and select Properties > General, then look at the Location.
If the saves are in the correct location, please post a screenshot of the contents of the saves folder, as in, I'd like to see the save names and sizes.