thank you, apologies for all the missing (vital) information - I am using Mint 14, Cinnamon - I found the GoFlex volume in /run/user/my_username
/GoFlex Home Public/any folder within
- quite a path name!!
however I was able to enter this into FreeFileSynch and it accepted it, so I can now compare, backup and synchronise folders on the GoFlex drive and my laptop - brilliant!!
as a bonus, I can now save files directly to the GoFlex drive from any program by navigating to /run/etc
through the Save dialogue (the Network locations cannot be navigated to in the Save File Explorer as they are not listed anywhere there)