@Winchestercester Yes, you can move your user data, including saves and mods, to a different hard drive. There are extra steps involved though, depending on what you're moving and what you'd like to keep where it is. When you get your second hard drive, please explain which files you want on that hard drive, and which you'd like to keep on the SSD, and I'll describe how to move what you want.
i want the game itself running from the ssd, and the mods, screenshots, saves, and etc folder that usually goes into the documents folder on my other hard drive
@Winchestercester The easiest way to do that is to move Documents in its entirety to the second hard drive. This is a simple process and is supported by Windows.
https://www.tenforums.com/tutorials/74952-move-location-documents-folder-windows-10-a.html
If you want to keep Documents overall on C but move the Sims 4 folder to D, you can do that as well. It's a bit more complicated but should work as well. Be sure to back up your data before you try this though, in case something gets deleted. This guide is for storing the user data folder on an external drive, but it also works on an internal one.
