How to add storage which has ever been created on CAS

As my last post, I did not set MMS to stand alone properly before reinstalling BE2014 and db on CAS. Then I cannot open MMS console with error cannot connect to database.

After I reinstalled BE2015 and DB on CAS I can now open the BE2014 on MMS. But found it cannot detect the drive which has ever created  storage when setup jobs in CAS. When I tried to create storage on MMS, it  did not  provide the drive with BEData folder in it.

What can I do to make MMS to use the storage drive which has ever been used by CAS jobs? Thanks