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WD Gold 12TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD121KRYZ
WD Gold 12TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD121KRYZ
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD121KRYZ
  • Item #: N82E16822232560
  • Return Policy: Standard Return Policy
  • $529.99
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  • $499.99 (6 Offers)
  • Save: 6%
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Seagate IronWolf Pro 4TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST4000NE001
Seagate IronWolf Pro 4TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST4000NE001
  • Average Latency: 4.16ms
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST4000NE001
  • Item #: N82E16822184797
  • Return Policy: Standard Return Policy
  • $199.99
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  • $169.99 (6 Offers)
  • Save: 15%
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Seagate BarraCuda ST1000DM010 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
Seagate BarraCuda ST1000DM010 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive - OEM
  • Height (maximum): 19.99mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST1000DM010
  • Item #: N82E16822179010
  • Return Policy: Standard Return Policy
  • $64.99
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  • $54.99 (7 Offers)
  • Save: 15%
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WD Red Pro WD6003FFBX 6TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
WD Red Pro WD6003FFBX 6TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD6003FFBX
  • Item #: N82E16822234344
  • Return Policy: Standard Return Policy
  • $269.99
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  • $223.99 (6 Offers)
  • Save: 17%
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WD Red Plus 2TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 128MB Cache, 3.5 Inch - WD20EFZX
WD Red Plus 2TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 128MB Cache, 3.5 Inch - WD20EFZX
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Parts: 3 Year
  • Model #: WD20EFZX
  • Item #: N82E16822234463
  • Return Policy: Standard Return Policy
  • $114.99
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  • $89.99 (4 Offers)
  • Save: 22%
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Seagate IronWolf Pro 10TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST10000NE0008
Seagate IronWolf Pro 10TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST10000NE0008
  • Average Latency: 4.16ms
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST10000NE0008
  • Item #: 1JW-001N-00026
  • Return Policy: Standard Return Policy
Toshiba 8TB Enterprise HDD SATA 6.0Gb/s 512e 7200 RPM 256MB Cache 3.5" Internal Hard Drive MG06ACA800E
  • $329.99
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  • $309.99 (2 Offers)
  • Save: 6%
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Seagate IronWolf 8TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST8000VN0022
Seagate IronWolf 8TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST8000VN0022
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST8000VN0022
  • Item #: N82E16822179003
  • Return Policy: Standard Return Policy
  • $369.99
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  • $299.99 
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WD Red 6TB NAS Internal Hard Drive - 5400 RPM Class, SATA 6Gb/s, SMR, 256MB Cache, 3.5" - WD60EFAX
WD Red 6TB NAS Internal Hard Drive - 5400 RPM Class, SATA 6Gb/s, SMR, 256MB Cache, 3.5" - WD60EFAX
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD60EFAX
  • Item #: 1Z4-0002-00MY7
  • Return Policy: Standard Return Policy
  • $204.99
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  • $164.99 (7 Offers)
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WD Gold 16TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 512MB Cache 3.5 Inch - WD161KRYZ
WD Gold 16TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 512MB Cache 3.5 Inch - WD161KRYZ
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Parts: 5 Year
  • Model #: WD161KRYZ
  • Item #: N82E16822234421
  • Return Policy: Standard Return Policy
  • $799.99
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  • $669.99 (4 Offers)
  • Save: 16%
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WD Red Pro WD181KFGX 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
WD Red Pro WD181KFGX 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Parts: 5 Year
  • Model #: WD181KFGX
  • Item #: N82E16822234430
  • Return Policy: Standard Return Policy
  • $819.99
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  • $759.99 (5 Offers)
  • Sale Ends in 7 Days (Sun) - Save: 7%
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Seagate 18TB Exos X18 7200 RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive HDD (ST18000NM000J)
Seagate 18TB Exos X18 7200 RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive HDD (ST18000NM000J)
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST18000NM000J
  • Item #: 1B4-00VK-00616
  • Return Policy: Standard Return Policy

Hard Drives

Hard drives are the central storage device for data on your computer. On it rests the documents you create, the music you listen to, the games you play and the video you view. You'll want to choose a drive which is optimized for your primary purpose.
There are a few main things to consider when selecting a hard drive: internal or external hard drive, connection type, speed and capacity. Whether you call it a Hard Drive, a Hard Disk, or an HDD, budget permitting, always go for the fastest drive you can. Speed of data access is measured using RPMs (revolutions per minute). Typical drives range from 5400 to 7200 ROM, with more and more 9600 RPM drive appearing on the scene. A faster rotational speed means greater performance, especially in games, but may cause greater heat and noise.
The capacity, measured in GB (gigabytes), should depend on your own storage requirements. A higher capacity drive will invariably cost more than a smaller drive, so a balance must usually be struck between capacity and cost.
The hard drive interface, whether it's IDE, SATA, or SCSI determine a drive's application: IDE and SATA for personal storage and SCSI for enterprise and mission critical storage. Please see our Internal Hard Drive Buying Guide for more information.

ATA/IDE

Whether you call it "Advanced Technology Attachment" or "Integrated Drive Electronics", the name given to it by Western Digital, this connection method has the drive controller integrated into the drive, rather than connected to the motherboard. They can communicate at up to 133 MB/s.

SATA 1.5 Gbit/s

First-generation SATA interfaces, also known as SATA/150 or unofficially as SATA 1, communicate at a rate of 150MB/s or 1.5 Gbit/s.

SATA 3.0 Gbit/s

Soon after SATA 1.5 Gbit/s introduction a number of shortcomings were observed. This feature, Native Command Queuing (NCQ), was adopted as an optional supported feature for SATA 1.5 Gbit/s and SATA 3.0 Gbit/s devices.
SATA 3.0 Gbit/s is designed to fall back to SATA 1.5 Gbit/s when in communication with these older devices. In practice, some older SATA controllers do not properly implement SATA speed negotiation. SATA cables are less expensive and more compact than for ATA.
With the introduction of SATA, convention ATA is sometimes called Parallel ATA (PATA), which refers to the method in which the data travels over the wires.

Cables and Connectors for SATA Devices

Connectors and Cables are the same for either generation. They are used on 3.5-in SATA hard disks for desktop and server computers and 2.5-in disks for laptop or small computers.

SCSI (Small Computer System Interface)

Actually a variety of interfaces ranging from Narrow SCSI at 40Mb/s to Ultra-640 SCSI at 5120Mb/s may be substantially more expensive than other connections, but it offers a wider range of connection and device possibilities. Frequently SCSI connections may be found in higher-speed disks, up to 15000 RPM.
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