The Sims 3.Everything from the Sims Store with worlds (2008-2014)

You just need to unzip and individually move thing's you need from folders to:
C:\Users\your name\OneDrive\Documents\Electronic Arts\The Sims 3\Downloads.
After that you need to open TS3 Launcher, go to downloads, click select all, and then click install.

You can do it right there ^^
In case the link is deleted, a spare will be in the comments under the guide
https://drive.google.com/file/d/1EngZvUIk3xt54vRwXojUg49Kwjq5ur2U/view?usp=sharing

EVERYONE!! revelation! - Junction link!
I can't stand the fact that the content fills up my small SSD.
Make a junction link to have your computer think it is reading from Documents but in reality it is ready from wherever you may wish!:

1. Move the entire The Sims 3 folder to where you want. For example in D:\Sims3. Do not leave a The Sims 3 folder behind, if it is there, the next step will fail. (LEAVE ELECTRONIC ARTS FOLDER EMPTY IN DOCUMENTS)

2. Click the Start button, then type CMD in the Start menu or Search box to open the Command Prompt.

3. Type mklink /J "C:\Users\(YOURACCOUNT)\Documents\Electronic Arts\The Sims 3" "D:/The Sims 3". Note; Does not need to be (D:\) can be anywhere you wish.

This will make a junction (symbolic hard link) to from the original location. It will recreate the folder you moved in the first step, but now as a symbolic link.

Windows and all programs will think the files are still in documents, but in reality they will be in [Desired Location] now.