Backup 2 Disk how can i specify different folder?

Hi

In an effort to keep my B2D media organized I was hoping to have different jobs backup to different folders but I am not seeing a way to specify the destinations when add a drive to the pool.  I have 5 USB drives that I rotated M to F.  All the jobs, on all the drives, are current are storedin the /B2D directory.  I tried creating a seperate share, and adding the disk as network storage but got an error that it was a local disk