Default how to access external drive from recovery session

I have a bit of a problem with my s4 i9500 - so i am in a recovery session and i am using aroma explorer
i also have a micro sd memory.
when i launch aroma (always in recovery mode session) i can see everything (all the files, links) in the internal drive, but i am not able to go UP to the basic ROOT where i can see the external drive and then everything that is in this drive.
BASICALLY I NEED TO COPY SOME FILES FROM THE EXTERNAL DRIVE ONTO THE INTERNAL DRIVE ONLY IN RECOVERY SESSION.
The phone DOES NOT start, so the ONLY OPTIONS i have are RECOVERY and DOWNLOAD sessions
DOES ANYONE KNOW HOW TO COPY/PASTE FILES FROM EXTERNAL TO INTERNAL IN RECOVERY OR DOWNLOAD SESSIONS.
I tried the "aroma explorer" program - is there another program similar that is more complete and allows to see/access ALL the drives on the phone (internal/external)
thanks for the help, much appreciated