Are you trying to access the device through command line or script that worked with 12.04 and previous versions? They've changed the default mount point for USB devices so you might have to change the way you are doing things slightly to take it into account.
Previously USB devices were accessed at
/media/volume
or
/media/UUID
From now on it looks like these devices will need to be accessed at
/media/username/volume
or
/media/username/UUID
Yep, it's a pain, but I found that inserting $LOGNAME in my scripts seems to be taking care of it quickly and neatly. For example instead of:
cp -nv /var/cache/apt/archives/*.deb /media/${args[0]}/archives/$release/
change to:
cp -nv /var/cache/apt/archives/*.deb /media/$LOGNAME/${args[0]}/archives/$release/
To repair any permissions problems make sure you own the drive and all subdirectories open a terminal window with CtrlAltt and :
sudo chown -R username:username /media/username/volume
such as:
sudo chown -R psychock7:psychock7 /media/psychoc7/BACKUP\ HDD
see if you can cd into the directories or if you get any errors.
cd /media
cd psychock7
cd backup\ hdd
cd dirname
etc.
You can use
ls
to get a directory listing, and use
ls -l
To get a long dirctory listing with extra information such as owner and access rights.