hmm... I'm only offering this advice based on a Linux background. You might want to start at the root directory and use the "find" command to locate a file in the filesystem that you know is in your Shared Folders directory.

If you have a file there named "grocery_list.txt", then you can search for it with:
find / -name grocery*

and it should show you the full path of the location of that file. View the man page for find, or if you don't have access to it, just google for the Linux Find command and you should locate documentation on it to show you how to use it with other options.