Welcome to the forum, Aille!
Well, from my experience Saved Sims always ends up in SavedSims folder.
You can look about this in:
My Documents/Electronic Arts/The Sims 3/SavedSims
I only know about Sim, I ever reinstall my game from the scratch because I had a new computer and them I just try to copy all item in SavedSims from my older computer and paste them to SavedSims folder in the new computer and voila I can access all of my created Sims in CAS. But I don't know about the clothes. But there is SavedOutfits folder for you to consider, maybe it works the same like SavedSims, but I don’t know about that.
Oh, before I forget. There also Library folder for you to consider, just copy and paste all content inside the folder to new Library folder to access created Sims in the family bin. I have tried this before so, I know
Maybe other can help. Good luck!