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Seagate Guardian Series Internal Hard Drives

New from Seagate - the Guardian Series of 10TB hard drives with 3 different models. The BarraCuda Pro for standard desktop usage, the IronWolf for use in a NAS, and the SkyHawk for security and surveillance.

Find out more about the Seagate Guardian Series:

Hard Drives Featured Items

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WD 4TB My Passport Wireless Pro Portable External Hard Drive - WiFi AC, SD, USB 3.0 - WDBSMT0040BBK-NESN
WD 4TB My Passport Wireless Pro Portable External Hard Drive - WiFi AC, SD, USB 3.0 - WDBSMT0040BBK-NESN

Extra savings w/ promo code EMCBBCC52, ends 11/26

  • Supported Operating Systems: Compatible with Windows 10, Windows 8.1 or Windows 7, Mac OS X El Capitan, Yosemite, Mavericks or Mountain Lion operating systems. Requires DLNA/UPnP or Plex-enabled devices for streaming.
  • Interface: SD Card Slot, USB 3.0, Wi-Fi
  • Temperature: 0°C - 35 °C
  • Dimensions: 0.94" x 5.00" x 5.00"
  • Model #: WDBSMT0040BBK-NESN
  • Item #: N82E16822235798
  • $219.99
  • | $197.99 (11 Offers)
  • Sale Ends in 2 Days (Thu) - Save: 10%
  • Free Shipping
WD Gold 2TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 128MB Cache 3.5 Inch - WD2005FBYZ
WD Gold 2TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 128MB Cache 3.5 Inch - WD2005FBYZ

Extra savings w/ promo code EMCBBCC24, ends 11/26

  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD2005FBYZ
  • Item #: 1Z4-0002-002V0
  • $144.99
  • | $123.99 (20 Offers)
  • Sale Ends in 5 Days (Sun) - Save: 14%
  • Free Shipping
WD Red 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD40EFRX
WD Red 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD40EFRX

Extra savings w/ promo code EMCBBCC22, ends 11/26

  • Height (maximum): 1.03"
  • Width (maximum): 4.00"
  • Length (maximum): 5.79"
  • Model #: WD40EFRX
  • Item #: N82E16822236599
  • $219.99
  • | $133.99 (31 Offers)
  • Sale Ends in 5 Days (Sun) - Save: 39%
  • Free Shipping
WD Purple 6TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD60PURZ
WD Purple 6TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD60PURZ

Extra savings w/ promo code EMCBBCC25, ends 11/26

  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD60PURZ
  • Item #: N82E16822231536
  • | $208.99 (18 Offers)
  • Sale Ends in 5 Days (Sun)
  • Free Shipping
WD Red 3TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD30EFRX
WD Red 3TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD30EFRX

Extra savings w/ promo code EMCBBCB29, ends 11/27

  • Height (maximum): 1.03"
  • Width (maximum): 4..00"
  • Length (maximum): 5.79"
  • Model #: WD30EFRX
  • Item #: N82E16822236344
  • $149.99
  • | $106.99 (31 Offers)
  • Sale Ends in 6 Days (Mon) - Save: 29%
  • Free Shipping
WD 2TB Elements Portable Hard Drive USB 3.0 Model WDBU6Y0020BBK-WESN Black
WD 2TB Elements Portable Hard Drive USB 3.0 Model WDBU6Y0020BBK-WESN Black

Extra savings w/ promo code EMCBBCC48, ends 11/26

  • Dimensions: 0.82" x 3.20" x 4.40"
  • Weight: 0.51 lb.
  • Package Contents: Portable hard drive USB cable Quick Install Guide
  • Electrical Outlet Plug Type: Consumer Electronics
  • Model #: WDBU6Y0020BBK-WESN
  • Item #: 1E8-0006-00101
  • $79.99
  • | $74.99 (11 Offers)
  • Sale Ends in 5 Days (Sun) - Save: 6%
  • Free Shipping
WD Black 1TB Mobile Hard Disk Drive - 7200 RPM SATA 6Gb/s 32MB Cache 2.5 Inch - WD10JPLX
WD Black 1TB Mobile Hard Disk Drive - 7200 RPM SATA 6Gb/s 32MB Cache 2.5 Inch - WD10JPLX

Extra savings w/ promo code EMCBBCB28, ends 11/25

  • Height (maximum): 9.5mm
  • Width (maximum): 69.85mm
  • Length (maximum): 100.20mm
  • Model #: WD10JPLX
  • Item #: N82E16822235089
  • $159.99
  • | $67.99 (22 Offers)
  • Sale Ends in 4 Days (Sat) - Save: 58%
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Seagate Backup Plus Slim 1TB USB 3.0 Portable External Hard Drive with Mobile Device Backup - STDR1000100 (Black)
Seagate Backup Plus Slim 1TB USB 3.0 Portable External Hard Drive with Mobile Device Backup - STDR1000100 (Black)

Extra savings w/ promo code EMCBBCC49, ends 11/26

  • Form Factor: 2.5"
  • Dimensions: 0.48" x 2.99" x 4.47"
  • Weight: 0.35 lb.
  • Package Contents: Backup Plus Slim portable drive 18-inch (45.72cm) USB 3.0 cable Quick start guide Seagate Dashboard backup software3 NTFS driver for Mac3 3 Requires Internet connection
  • Model #: STDR1000100
  • Item #: N82E16822178431
  • $79.99
  • | $59.99 (9 Offers)
  • Sale Ends in 5 Days (Sun) - Save: 25%
  • Free Shipping
HGST DeskStar NAS 3.5" 6TB 7200 RPM 128MB Cache SATA 6.0Gb/s High-Performance Hard Drive for Desktop NAS Systems Retail Packaging 0S04007
HGST DeskStar NAS 3.5" 6TB 7200 RPM 128MB Cache SATA 6.0Gb/s High-Performance Hard Drive for Desktop NAS Systems Retail Packaging 0S04007

Extra savings w/ promo code EMCBBCB27, ends 11/27

  • Height (maximum): 26.10mm
  • Width (maximum): 101.00mm
  • Length (maximum): 146.00mm
  • Model #: 0S04007
  • Item #: N82E16822146118
  • $299.99
  • | $188.99 (11 Offers)
  • Sale Ends in 6 Days (Mon) - Save: 37%
  • Free Shipping
Seagate 2TB Expansion Portable External Hard Drive USB 3.0 Model STEA2000400 Black
Seagate 2TB Expansion Portable External Hard Drive USB 3.0 Model STEA2000400 Black

  • Form Factor: 2.5"
  • Dimensions: 0.58" x 3.15" x 4.61"
  • Weight: 0.37 lb.
  • Package Contents: Seagate Expansion drive 18-inch (45.72cm) USB 3.0 cable Quick start guide
  • Model #: STEA2000400
  • Item #: N82E16822178745
  • $89.99
  • | $69.99 (13 Offers)
  • Save: 22%
  • Free Shipping
TOSHIBA X300 5TB Desktop Hard Drive 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Retail Packaging HDWE150XZSTA
TOSHIBA X300 5TB Desktop Hard Drive 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Retail Packaging HDWE150XZSTA

Additional savings w/ promo code BF17FLYER26, limited offer

  • Average Latency: 4.17ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: HDWE150XZSTA
  • Item #: N82E16822149628
  • $399.99
  • | $139.99 (14 Offers)
  • Sale Ends in 4 Days (Sat) - Save: 65%
  • Free Shipping
Seagate IronWolf 2TB NAS Hard Drive 5900 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive ST2000VN004
Seagate IronWolf 2TB NAS Hard Drive 5900 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive ST2000VN004

  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST2000VN004
  • Item #: N82E16822179007
  • $84.99
  • | $69.99 (8 Offers)
  • Sale Ends in 18 Hours - Save: 18%
  • Free Shipping
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  • HDD Technology
  • HDD Specifications
  • Form Factors and Interfaces
  • Specialized Hard Drives
  • FAQ

Hard drive technology dates back to 1956 when IBM used them in huge mainframe computers. The first model had 50 platters, each 24-inches in diameter, stacked and enclosed in a metal box the size of industrial refrigerator. It cost $10,000 and stored 5 MB of data.

Today, desktop units store 10 TBs in a 3.5-inch casing, and cost roughly five cents per gigabyte.

A mechanical hard disk drive (HDD) is a remarkable feat of engineering. Magnetically-coated circular platters rotate at high speeds around a central hub; a magnetic head at the tip of an actuator arm reads and writes data on the platters by extrapolating binary code from changes in electrical current. The head skims just nanometers above the platters with extraordinary precision by gravitational physics, while simple mechanical implements keep the platters free of dust and debris.

In personal computing, the IBM XT in 1983 was the first to encase hard disk storage inside a computer case. Three years later, Apple added a SCSI port in the back of the Mac Plus for connecting an external hard drive for expandable storage. The technology retains this same general essence today.

Advances in predictive mathematics and miniaturization have driven advances in hard disk storage capacity. Fast-spinning motors have leveled up read and write speeds for faster performance—a standard hard drive for gaming spins at 7200 RPM and has a capacity of 1 or 2 terabytes.

Hard disk drive manufacturer consolidation through the years has left only three OEM hard drive companies in the market: Seagate, Western Digital, and Toshiba.

Are hard drives almost obsolete?

With inexpensive cloud storage backup services widely available, and consumer-grade solid-state drives dropping in price, some think the illustrious span of relevance for hard disk storage is coming to a close. Nonetheless, HDD storage solutions continue to deliver on performance and price value propositions.

Budget-conscious performance PC users have a small SSD for the operating system and main applications, running it in tandem with inexpensive hard disks used for file storage. Hybrid drives build in the same features with a small solid-state drive encased with a standard HDD.

For home media and business, HDD remain the go-to for shared storage and backup file servers. Disks specialized for Network Attached Storage (NAS) and video surveillance systems offer optimized performance for those systems.

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