Lost all my households

Hi @EuphorialQueen  and @SheriGR 

Thank you so much for your help thus far. Ok so regarding the restoration of backed up saves, I have actually done that already in game, and in all the 6 saves the Sims are not there; this is actually one of the first things I did when the problem first occurred. I actually initially thought you were referring to another restore method I did not know about ☹️. 

Regarding the separate folders, I think I understand, however looking at the save files, how are you able to know which file corresponds with the each game as it is all zeros and ones.?

Having gone through all the possible troubleshooting methods, I can only think of one thing that caused this, and that is when I added more game and stuff packs to the game, as that is when the problem occured. And I took the liberty of going through the game that lost all but one of my sims and then I started a new one, to compare the townie Sims. I then discovered that in the game that lost my played households, all the Sims (including the unplayed households, except for the one sim I was last playing) are gone, and seem to have been replaced, all the normal townies, gone; Goths, Langraabs, Calientes, Spencer-Kim-Lewis etc, all gone too, and other Sims I have never even heard of before are living in their homes. 

So my thinking is, if the game packs and stuff packs caused this shift, and if I still have one of my Sims still in the game as well as all my customised lots and businesses, surely there must be a way to reverse this or at least locate the sims right? The question is how if the cause is the game packs and stuff packs.