NAS supported SMR hard drives (HDD) Asustor have updated their HDD compatibility list for SMR drives from WD. Western Digital 3.5'' SATA III Hard Drive WD60EFAX-68JH4N0 6 TB NAS Red SMR All Western Digital 3.5'' SATA III Hard Drive WD60EFAX-68JH4N0 6 TB NAS Red SMR AS