Save location, Where can I find it

It's hidden by default, You'll need to set visibility of hidden folders using control.exe folders from the windows MRU.
then you'll find the savegame path right here:
C:\Users\"Whatever Your Username Maybe"\AppData\Local\Saints Row The Third
Hope this was of small help.

Carpe Noctem

Modding patch tester
They updated the save location for the Epic version by an additional folder.

Epic Games location:
C:\Users\"username"\AppData\Local\Saints Row The Third\Remastered

Steam location:
C:\Program Files (x86)\Steam\userdata\215460606 [folder number may vary]\978300\remote