The locations on disk where the SAP FRP data environments are stored, are administered through transaction /FRE/FRP_ADMIN.
However, if you don't have authorisation for this transaction, you can also check the table "/fre/frpmid_srv" (a client dependent table).
However, if you don't have authorisation for this transaction, you can also check the table "/fre/frpmid_srv" (a client dependent table).