0F27001 – EMC 4TB 7200 RPM SAS 3.5″ HDD for VNX5100, 5200, 5300, 5400, 5500, 5600, 5700, 5800, 7500, 7600, 8000 series 15 disk enclosures and VNXe3300 – Disk Drive Finder
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HGST/WD Ultrastar 4TB 7200 RPM 512e SATA 6Gb/s 3.5-Inch Enterprise Hard Drive (HUS726T4TALE6L4) - Newegg.com
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Western Digital RE WD4000FYYZ 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive - w/3 Years Warranty - Walmart.com
Seagate Enterprise Capacity 3.5'' HDD 4TB 7200 RPM 512e SATA 6Gb/s 128MB Cache Internal Hard Drive ST4000NM0115 - Newegg.com
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X477A-R6 – NetApp 4TB 7200 RPM SAS 3.5″ HDD for DS4243, DS4246 24 bay enclosures – Disk Drive Finder
HGST HUS726T4TALE6L4 Ultrastar 4TB 7200 RPM 512e SATA 6Gb/s 3.5-Inch Internal Hard Disk Drive
HGST Deskstar 3.5-Inch 4TB 7200 RPM SATA III 6Gbps 64MB Cache (0F14681) | eBay
Amazon.com: HGST WD Ultrastar HUS726T4TALE6L4 4TB 7200 RPM 512e SATA 6Gb/s 3.5-Inch Internal Hard Disk Drive : Electronics
Western Digital RE WD4000FYYZ 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive - w/3 Years Warranty - Walmart.com
Refurbished: WP Arsenal 4TB SATA 6Gb/s 7200RPM 3.5" DAS HDD – Water Panther
HGST Deskstar NAS 3.5" 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s High-Performance Hard Drive for Desktop NAS Systems Retail Packaging - Newegg.com
HGST 4TB 3.5" SATA3 HDD-T4TB-HUS726T4TALE6L4 Internal Enterprise Hard Drive
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Amazon.com: Seagate Enterprise 4TB Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM, 256MB Cache (ST4000NM004C) : Electronics
ST4000NM0023 Seagate 4TB 3.5 inch SAS Server Enterprise Hard Drive