Synology HAT5300-4T 4TB 3.5" SATA 7200rpm Enterprise Grade HDD (MTTF 2 Million Hours) / Synoloyg NAS Exclusive / 5 Year Warranty
Seagate Exos 7E10 4TB 3.5" HDD-T4000-ST4000NM000B Internal Enterprise Hard Drive
Seagate Barracuda Pro ST4000DM006 4 TB 3.5" Internal Hard Disk Drive (HDD) SATA III 6.0Gb/s 7200 RPM 128 MB (20PK) | Fast Server Corp. www.srvfast.com
Dell 4TB 3.5in SAS Hard Drive MG03SCA400
Amazon.com: White Label WL 4TB 7200RPM 64MB Cache SATA 6.0Gb/s (Enterprise Grade) 3.5" Hard Drive (for Server, RAID, NAS, DVR, Desktop PC) w/1 Year Warranty : Electronics
WD 4TB Black 7200 rpm SATA III 3.5" Internal HDD (OEM)
Toshiba 4tb Enterprise Class Hard Drive Disk Hdd Hd Internal Sata Iii 6gb/s 7200rpm 128m 3.5" Harddisk Harddrive 24/7 24x7 Gamin - Hard Disk Drive - AliExpress