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Seagate Cheetah 15K.4 ST373454SS 74GB 15000 RPM 8MB Cache Serial Attached SCSI (SAS) 3.5" Hard Drive Bare Drive
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Seagate
Seagate Cheetah 15K.4 ST373454SS 74GB 15000 RPM 8MB Cache Serial Attached SCSI (SAS) 3.5" Hard Drive Bare Drive
  • Average Seek Time: 3.5ms
  • Average Write Time: 4.0ms
  • Average Latency: 2ms
  • Parts: 5 years limited
  • Model #: ST373454SS
WD WD RE4 WD5003ABYX 500GB 7200 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Refurbished WD WD RE4 WD5003ABYX 500GB 7200 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: WD5003ABYX
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  • $30.99 
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HP 347708-B22 147GB 15000 RPM Ultra320 SCSI 3.5" Hard Drive Bare Drive
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HP 347708-B22 147GB 15000 RPM Ultra320 SCSI 3.5" Hard Drive Bare Drive
  • Average Seek Time: 3.8ms
  • Parts: 1 year limited
  • Labor: 1 year limited
  • Model #: 347708-B22
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  • $111.90 
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HP AW555A 2TB 7200 RPM SAS 6Gb/s 3.5" Internal Hard Drive Bare Drive
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HP
HP AW555A 2TB 7200 RPM SAS 6Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: AW555A
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  • $60.19 
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Western Digital Blue WD2500AAKX 250GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Refurbished Western Digital Blue WD2500AAKX 250GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • NAND Flash Memory Type: SLC
  • Features: WD expands their award-winning desktop and mobile storage lineup with WD Blue PC hard drives. Extensively tested and built to WD's high standards, WD Blue offers a wide variety of capacities - ranging from 250GB to the massive 6TB - in both desktop and mobile models. Drive WD Blue with
  • Usage: For Daily Computing
  • Height (maximum): 25.40mm
  • Model #: WD2500AAKX
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TOSHIBA MK1002TSKB 1TB 7200 RPM 64MB Cache SATA 3.0Gb/s 3.5" Enterprise Hard Drive
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TOSHIBA MK1002TSKB 1TB 7200 RPM 64MB Cache SATA 3.0Gb/s 3.5" Enterprise Hard Drive
  • Average Seek Time: 9.5ms
  • Average Latency: 4.17ms
  • NAND Flash Memory Type: Enterprise
  • Parts: 2 yrs
  • Model #: MK1002TSKB
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1TB 7.2K RPM SATA 6GBPS 512N
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DELL
1TB 7.2K RPM SATA 6GBPS 512N
  • NAND Flash Memory Type: SLC
  • Model #: 400-ATJJ
8TB Ent 3.5" SATA 6Gbs SED512E (ST8000NM0105)
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HP 695510-B21 4TB 7200 RPM SAS 6Gb/s 3.5" Hot Plug SmartDrive LFF Midline Drive Bare Drive
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  • $118.19 
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Dell R3H6D - Dell 1.2TB 2.5" SAS 10K 12Gb/s Hard Drive
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DELL
Dell R3H6D - Dell 1.2TB 2.5" SAS 10K 12Gb/s Hard Drive
  • Average Latency: 6Gb/s
  • Model #: R3H6D
Hitachi Deskstar 7K1000.B HDT721064SLA360 640 GB 3.5' Internal Hard Drive
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  • $33.99 
  • Free Shipping
Seagate SV35.5 ST3500410SV 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate SV35.5 ST3500410SV 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • NAND Flash Memory Type: Hard Drive
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST3500410SV
  •  
  • $190.00 
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WD2500AAKX Western Digital M4HXR 250GB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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  • $36.88 
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Seagate BarraCuda 7200.10 ST3250820AS 250GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive
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Seagate BarraCuda 7200.10 ST3250820AS 250GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 10ms
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Model #: ST3250820AS
  • $60.21
  •  
  • $50.00 
  • Save: 16%
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Seagate DB35 Series 7200.2 ST3802110ACE 80GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate
Seagate DB35 Series 7200.2 ST3802110ACE 80GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 18ms
  • Average Write Time: 20ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3802110ACE
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  • $70.00 
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Seagate ST91000640SS 9RZ268 1TB 7.2K RPM 6Gb/s 2.5" SAS HDD Hard Drive
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Seagate
Seagate ST91000640SS 9RZ268 1TB 7.2K RPM 6Gb/s 2.5" SAS HDD Hard Drive
  • Model #: ST91000640SS-9RZ268-seagate-newZeroHrs
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HPE ISS 872491-B21 4TB SATA 7.2K LFF SC DS HDD
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HPE ISS 872491-B21 4TB SATA 7.2K LFF SC DS HDD
  • NAND Flash Memory Type: Hard Drive
  • Average Latency: 6Gb/s
  • Model #: 872491-B21
WD3200AAKS Western Digital 320GB 7.2K RPM 3Gb/s 3.5" SATA DESKTOP HDD Hard Drive
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Seagate BarraCuda 7200.11 ST31000333AS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda 7200.11 ST31000333AS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST31000333AS
  •  
  • $89.10 
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Seagate BarraCuda 7200.9 ST3808110AS 80GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3808110AS 80GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3808110AS
Seagate BarraCuda 7200.10 ST3320820AS 320GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate
Seagate BarraCuda 7200.10 ST3320820AS 320GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Parts: 3 years limited
  • Labor: 3 years limited
  • Model #: ST3320820AS
Seagate BarraCuda 7200.9 ST3250824A 250GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3250824A 250GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 11ms
  • Average Write Time: 12ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3250824A
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  • $141.19 
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Dell 400-AUNQ - Dell 600GB 2.5" SAS 10K 12Gb/s Hard Drive
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DELL
Dell 400-AUNQ - Dell 600GB 2.5" SAS 10K 12Gb/s Hard Drive
  • NAND Flash Memory Type: SLC
  • Average Latency: 6Gb/s
  • Usage: For Enterprise Storage
  • Model #: 400-AUNQ
Seagate BarraCuda 7200.10 ST3400620AS 400GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive
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Seagate BarraCuda 7200.10 ST3400620AS 400GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 10ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3400620AS
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  • $72.10 
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HP 600 GB 3.5" Internal Hard Drive
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HP
HP 600 GB 3.5" Internal Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Average Latency: 6Gb/s
  • Usage: Ideal for Servers
  • Parts: 30 DAYS WARRANTY
  • Model #: 517354-001
Dell 2T51W 1 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
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DELL
Dell 2T51W 1 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
  • Average Latency: 6Gb/s
  • Usage: Ideal for Servers
  • Model #: 2T51W
Hitachi CinemaStar P7K500 HCP725050GLA380 500 GB 3.5' Internal Hard Drive
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0-HOURS Western Digital WD3200AAJS 320GB 7200RPM 3Gbps 3.5" SATA HDD Hard Drive
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  • $46.88 
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Seagate BarraCuda ES ST3320620NS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda ES ST3320620NS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3320620NS
  •  
  • $52.00 
  • Free Shipping
Dell RF9T8 EMC HUC101818CS4204 1.80 TB Hard Drive - 2.5" Internal - SAS (12Gb/s SAS)
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Seagate BarraCuda 7200.9 ST3250824AS 250GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3250824AS 250GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8ms
  • Average Write Time: 9ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3250824AS
  •  
  • $68.10 
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Desktop internal hard drives store operating systems, system files, software and individual files. They can offer anywhere from 500GB of storage up to 8TB or more and come with a variety of interfaces. Although most internal drives are 3.5in., some devices use a smaller 2.5in. form factor. Smaller and larger physical sizes are rare but do exist. Also, consider the speed of the drive. Internal hard drives for desktop computers tend to run at 7,200 revolutions per minute (RPM) but faster read-write speeds minimize waiting time. Hard drives with speeds of up to 15,000 RPM are available. Finally, memory cache is the amount of memory that can be active at any given time. A larger cache is important if you work with multiple large files at once.

Improve Your Computer's Performance with a New Hard Drive

You might not be concerned about storage space when you buy a new PC, but the hard drive will fill will with files and software. A new desktop internal hard drive can replace an existing drive that has reached maximum capacity. Alternatively, if your motherboard has a spare bay, you can add a second or additional device to expand storage. An internal HDD for PCs is easy to install, has greater capacity and speed than an external device and comes with multiple storage options.

Store All Your Data with Large Capacity Drives

Every piece of software you install, every song you save, every video you download takes up storage space, which can slow down a computer. A 720p movie takes up approximately 8GB, while a 4k video can consume as much as 100GB of a desktop internal hard drive. Even the Windows 10 operating system requires 15GB. A 500GB hard drive can be useful for storing files while you're on the move before transferring them to a larger drive if you don't have a personal cloud device or portable hard drive. For everyday and ongoing storage, this size drive will quickly fill up. Desktop internal hard drives offer the storage of up to 16TB in some cases, providing plenty of space for software and files.

Ensure Compatibility by Choosing the Right Interface

The most commonly used standards for connecting a desktop internal hard drive to a motherboard are SATA and SAS. Determine the motherboard's interface and ensure that you match this when buying a new drive to ensure compatibility and to avoid having to use an adapter. Check the label off the drive you are replacing or look at the manufacturer guidelines for your motherboard.

Access Data Quicker with a Fast SATA Internal Hard Drive

The speed the disk platters spin determines how quickly information can be retrieved from the drive. It is common for external hard drives to have a speed of 5,000 RPM because this draws less power and makes minimal noise. Other hard drive designs have a speed of up to 15,000 RPM, depending on the model.

Bestselling Desktop Internal Hard Drives Reviews:

Keith V.
4/9/2026 4:20:16 PM
High Capacity Plug and Play Drive

“ SATA so it plugs right into my old media server ”

Seagate BarraCuda ST24000DM001 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
Perry K.
3/26/2026 7:05:57 AM
Seagate Barracuda 2TB Hard Drive

“ Received and installed new Seagate Hard Drive in older Dell Inspiron PC. ”

Seagate BarraCuda ST2000DM008 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
Anonymous
1/17/2026 7:23:35 PM
Works great if not DOA

“ I initially purchased two drives to replace two old WD 6TB drives (one died before Xmas) in a WD NAS. ”

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX