.bat file details:

I did this for ease of installation, I created this for my friend who has difficulty with mod installs. With the save files inside a windows hidden folder, this saved me a lot of headache. The content of the .bat file is as follows.

Assuming file is in downloads (windows 10)

move /-y "C:\Users\%USERPROFILE%\Downloads" "C:\Users\%USERPROFILE%\AppData\Roaming\The Creative Assembly\Warhammer\save_games"
pause

All this does is tell windows to move the save files in the folder to the Save files folder in your AppData Total War Warhammer folder.

To change from and to location just right click on the .bat file and choose edit.

Example of changes should it be on desktop. Just change the first location to match where the folder is e.g. C:\Users\%USERPROFILE%\Desktop

move /-y "C:\Users\%USERPROFILE%\Desktop" "C:\Users\%USERPROFILE%\AppData\Roaming\The Creative Assembly\Warhammer\save_games"
pause

if your AppData folder has been moved I shall assume because you have done that you are capable of moving the files manually or know how to edit its location.