Re: [ARCHIVED] Questions regarding drop of 32 bit OS Support/Legacy Edition
To my horror, I just discovered exactly the same thing.
ETA: Ok, no need to panic just yet. The files are actually still intact under the regular Sims4 folder on your computer. So, it should just be a matter of transferring them over. But it's probably a good idea to save them somewhere else first also.
But this still stands.
It even says in the patch notes for Legacy Edition:
Will my save files still work in The Sims 4 Legacy Edition?
Yes, save files will still work with The Sims 4 Legacy Edition. Your save files will automatically transfer over when you first launch The Sims 4 Legacy Edition.