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Seagate Cheetah 15K.4 ST3146854SS 147GB 15000 RPM 8MB Cache Serial Attached SCSI (SAS) 3.5" Hard Drive Bare Drive
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Seagate
Seagate Cheetah 15K.4 ST3146854SS 147GB 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 #: ST3146854SS
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  • $109.00 
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Seagate SV35.3 ST31000340SV 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate SV35.3 ST31000340SV 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 #: ST31000340SV
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  • $110.19 
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Western Digital WD Green WD15EADS 1.5TB 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  • $48.10 
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Seagate BarraCuda ES.2 ST3500320NS 500GB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda ES.2 ST3500320NS 500GB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Model #: ST3500320NS
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  • $200.19 
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DELL 00Y 500Gb 7200Rpm Sata6Gbps 2.5Inch Low Profile Hard Disk Drive
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DELL
DELL 00Y 500Gb 7200Rpm Sata6Gbps 2.5Inch Low Profile Hard Disk Drive
  • NAND Flash Memory Type: SLC
  • Usage: Ideal for Servers
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 00X3Y
HP 655708-B21 7200 RPM SATA 6.0Gb/s 2.5" Internal Notebook Hard Drive
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HP
HP 655708-B21 7200 RPM SATA 6.0Gb/s 2.5" Internal Notebook Hard Drive
  • Height (maximum): 15.75mm
  • Width (maximum): 75.7mm
  • Length (maximum): 118.62mm
  • Parts: 1 Year
  • Model #: 655708-B21
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  • $161.56 
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HP 286716-B22 147GB 10000 RPM Ultra320 SCSI 3.5" Hard Drive
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HP 286716-B22 147GB 10000 RPM Ultra320 SCSI 3.5" Hard Drive
  • Parts: 1 year limited
  • Labor: 1 year limited
  • Model #: 286716-B22
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  • $88.19 
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Seagate BarraCuda 7200.9 ST3300822AS 300GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3300822AS 300GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3300822AS
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  • $110.00 
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Seagate SV35.2 ST3750640AV 750GB 7200 RPM 16MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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  • $133.00 
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Seagate Pipeline HD ST3500321CS 500GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  • $98.00 
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Seagate Pipeline HD ST3320310CS 320GB 8MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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  • $50.00 
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Western Digital Blue WD1600AAJS 160GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Used - Like New Western Digital Blue WD1600AAJS 160GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 8.9ms
  • Average Latency: 4.2ms
  • NAND Flash Memory Type: Desktop
  • Parts: 2 Year Warranty from Reseller
  • Model #: WD1600AAJS
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Seagate Exos X20 ST18000NM000D 18TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive
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Seagate
Seagate Exos X20 ST18000NM000D 18TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive
  • Average Latency: 4.16ms
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST18000NM000D
Seagate BarraCuda 7200.9 ST3500641AS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3500641AS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8.2ms
  • Average Write Time: 9ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3500641AS
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  • $135.00 
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ST320LT007 Seagate 9ZV142-034 320GB 7.2K RPM 3Gb/s 2.5" SATA LAPTOP Hard Drive
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HP P2000 AP858A 300GB 15000 RPM SAS 6Gb/s 3.5" Internal Hard Drive
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HP P2000 AP858A 300GB 15000 RPM SAS 6Gb/s 3.5" Internal Hard Drive
  • Parts: 1 year limited
  • Labor: 1 year limited
  • Model #: AP858A
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Western Digital RE3 WD5002ABYS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Refurbished Western Digital RE3 WD5002ABYS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.2ms
  • Parts: 90 days limited
  • Labor: 90 days limited
  • Model #: WD5002ABYS
  •  
  • $40.00 
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Seagate BarraCuda V ST330013A 30GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate
Seagate BarraCuda V ST330013A 30GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 9ms
  • Height (maximum): 1"
  • Width (maximum): 4"
  • Length (maximum): 5.5"
  • Model #: ST330013A
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  • $150.19 
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WD RE4 WD2003FYYS 2TB 7200 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Refurbished WD RE4 WD2003FYYS 2TB 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 #: WD2003FYYS
ST900MM0006 Seagate 9WH066 900GB 10K RPM 6Gb/s 2.5"SAS HDD Hard Drive - (0 HRS)
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  • $42.00 
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WD AV WD5000AURX 500GB IntelliPower 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Used - Like New WD AV WD5000AURX 500GB IntelliPower 64MB 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 #: WD5000AURX
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  • $75.10 
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HP 512547-S21 146GB 15000 RPM 2 x SAS 600 Serial Attached SCSI 2.5" Internal Hard Drive
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HP
HP 512547-S21 146GB 15000 RPM 2 x SAS 600 Serial Attached SCSI 2.5" Internal Hard Drive
  • Height (maximum): 9.5mm
  • Width (maximum): 69.75mm
  • Length (maximum): 100.3mm
  • Parts: 1 year limited
  • Model #: 512547-S21
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  • $61.19 
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Seagate Cheetah 15K.5 ST3146855SS 146GB 15000 RPM 16MB Cache SAS 3Gb/s 3.5" Internal Hard Drive Bare Drive
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Refurbished Seagate Cheetah 15K.5 ST3146855SS 146GB 15000 RPM 16MB Cache SAS 3Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 4ms
  • Average Latency: 2ms
  • Parts: 1 YR
  • Labor: 1 YR
  • Model #: ST3146855SS
Seagate BarraCuda 7200.9 ST3300622AS 300GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3300622AS 300GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3300622AS
  •  
  • $75.00 
  • Free Shipping
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ST2000VX000 Seagate 9YW164 SV35 Series 2TB 7200RPM 6Gbps 3.5"SATA HDD Hard Drive
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453KG DELL AL14SEB060N 600GB 10K RPM 12Gb/s SFF 2.5" SAS SERVER HDD Hard Drive
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0-HOURS ST600MM0006 Seagate 9WG066 600GB 10K RPM 6Gbps 2.5" SAS HDD Hard Drive
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  • $50.88 
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ST2000NM0023 Seagate 9ZM275-031 2TB 7.2KRPM 6Gb/s 3.5"SAS HDD Hard Drive W/0 HRS
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  • $74.00 
  • Free Shipping
ST3000NM0033 Seagate CONSTELLATION 3TB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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  • $135.00 
  • Free Shipping
0-HOURS Seagate ST1000DM003 1ER162-501 1TB 7200RPM 6Gbps 3.5"SATA HDD Hard Drive
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  • $58.88 
  • Free Shipping
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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