Hello,
Default setting is below, please try looking in the following folder;
C:\Program Files(x86)\Ubisoft\Ubisoft Game Launcher\savegamesxx\205 <-
The save folder should be named 205. Unfortunately, there are no possible ways to transfer saves from one user to another.
If you have any further questions or concerns, please open up a ticket with Support. You can find the links to Support in my sig below!