POWEREDGE R730 RAID EXPANSION

Hi everyone,

i've a poweredge r730 equipped with 

405-AAEG : PERC H730 Integrated RAID Controller, 1GB Cache 

400-AJON : 1.2TB 10K RPM SAS ISE 2.5in Hot-plug Hard Drive (8 hd unit)

i'd like to know it is possible to expand the memory, mounting more hds.

thank you