Reading files from code

[psychemedia]

If I mount a file system directory, open a notebook in that context, and then try to read a file in that context, e.g. using pandas I get a file not found error.

Is there a way of setting a path either to a file in the file system directory, or a path to a file in the default file system (the browser file directory context, not the shared file-system-access context) when working on a notebook in the shared file-system context?