I started a new game on my new PC and now I want to add my save files from old PC to new one. What is the most efficient way to do this? More importantly, The game on my new PC includes multiple played households in Strangerville, all of which are related. The game on the old PC has played households over 4 different worlds but not Strangerville. Can I add my old save files and have all characters playable together while maintaining relationships?
1. Copy the files onto the cloud service or removable media of your choice, make sure the names don’t conflict, and copy them over to the new machine. (If Windows asks you if you want to overwrite, say NO!)
2. Not unless you copy the Sims form one save file into the other.
So, copying Sims households. You can save them to your library and place them into a new save, but they’ll lose relationships outside their household. I’ve done it when my save got corrupted. You can, of course, merge and separate households beforehand, or cheat their relationships to match what the used to be,
@Squidlillie You could experiment in combining the files with the following file content information in mind:
Now the above example will only get a copy of a game save into the new game. For instance, you could begin with the folder where you have all of your old game saves and add the Strangerville game save to it. Personally, that's what I would do. Then you can play the Strangerville save still, though it is separate from the other game save(s). You could then use methods that @xochiquetzl_xkvn suggested for adding in full households of Sims that you want to keep the relationships intact with, etc.
They recommends starting new threads here, so you’re doing it right, but this old thread might help explain the second part of your question and how to get the Sims in two saves to interact. https://answers.ea.com/t5/General-Discussion-Feedback/HMerge-saved-games/m-p/12276778/highlight/true#M70132
