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Seagate BarraCuda 7200.11 ST31000340AS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
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Refurbished Seagate BarraCuda 7200.11 ST31000340AS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 90 days limited
  • Labor: 90 days limited
  • Model #: ST31000340AS
  •  
  • $49.10 
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Hitachi Deskstar 7K1000.B HDT721064SLA360 640 GB 3.5' Internal Hard Drive
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  • $33.99 
  • Free Shipping
Seagate Cheetah ST3600057FC-FR 600GB 15000 RPM 16MB Cache Fibre Channel 4Gb/s 3.5" Internal Hard Drive Bare Drive
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Refurbished Seagate Cheetah ST3600057FC-FR 600GB 15000 RPM 16MB Cache Fibre Channel 4Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 2ms
  • Height (maximum): 1.0"
  • Width (maximum): 4.0"
  • Length (maximum): 5.76"
  • Model #: ST3600057FC-FR
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  • $48.60 
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Dell 55RMX 500GB 7200 RPM SAS 6Gb/s 2.5" Internal Hard Drive Bare Drive
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DELL
Dell 55RMX 500GB 7200 RPM SAS 6Gb/s 2.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 55RMX
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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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 
  • Free Shipping
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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ST4000NM000B Seagate Exos 7E10 4TB 3.5" SATA 7.2K RPM 6Gb Hard Drive 2TF100-003
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  • $245.10 
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Seagate SV35.6 Series ST1000VX000 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Surveillance Hard Drive Bare Drive
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  • $69.10 
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HP 512743-001 72GB 15000 RPM SAS 6Gb/s 2.5" Internal Hard Drive
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HP
HP 512743-001 72GB 15000 RPM SAS 6Gb/s 2.5" Internal Hard Drive
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 512743-001
  •  
  • $48.19 
  • Free Shipping
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
Seagate Cheetah ST318453LW 18.4GB 15000 RPM 8MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
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Seagate Cheetah ST318453LW 18.4GB 15000 RPM 8MB Cache SCSI Ultra320 68pin 3.5" Hard Drive Bare Drive
  • Average Seek Time: 3.6ms
  • Average Write Time: 4.0ms
  • Average Latency: 2ms
  • Parts: 5 years limited
  • Model #: ST318453LW
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  • $340.19 
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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 
  • Free Shipping
Dell TN937 146GB 15000 RPM 16MB Cache SAS 3Gb/s 3.5" Internal Hard Drive Bare Drive
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Dell TN937 146GB 15000 RPM 16MB Cache SAS 3Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: TN937
00NA492 00NA491 00NA495 IBM 1TB 7.2K RPM 12Gb/s NL 2.5" SAS HDD Hard Drive
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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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Hitachi CinemaStar P7K500 HCP725050GLA380 500 GB 3.5' Internal Hard Drive
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Seagate BarraCuda ES.2 ST3500620SS 500GB 7200 RPM 16MB Cache SAS 3Gb/s Internal Hard Drive
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Seagate
Seagate BarraCuda ES.2 ST3500620SS 500GB 7200 RPM 16MB Cache SAS 3Gb/s Internal Hard Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Enterprise
  • Model #: ST3500620SS
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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Seagate ST500VM000 500GB 3.5" SATA 5900rpm Internal Hard Drive - Hot Pluggable
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Seagate ST500VM000 500GB 3.5" SATA 5900rpm Internal Hard Drive - Hot Pluggable
  • NAND Flash Memory Type: Hard Drive
  • Usage: For Daily Computing
  • Model #: ST500VM000
  •  
  • $79.10 
  • Free Shipping
Seagate BarraCuda 7200.9 ST3300622A 300GB 7200 RPM 16MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.9 ST3300622A 300GB 7200 RPM 16MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3300622A
  •  
  • $370.00 
  • Free Shipping
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Seagate IronWolf Pro ST2000NE0025 2TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate
Seagate IronWolf Pro ST2000NE0025 2TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Average Latency: 4.16ms
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST2000NE0025
  •  
  • $285.10 
  • Free Shipping
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Dell 190FH - Dell 300GB 2.5" SAS 15K 12Gb/s Hard Drive
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DELL
Dell 190FH - Dell 300GB 2.5" SAS 15K 12Gb/s Hard Drive
  • Average Latency: 12Gb/s
  • Model #: 190FH
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
BUFFALO OP-HD3.0T/4K-3Y 3TB SATA 3.0Gb/s 3.5" 4K Sector Optional Hard Drive for TeraStation
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BUFFALO OP-HD3.0T/4K-3Y 3TB SATA 3.0Gb/s 3.5" 4K Sector Optional Hard Drive for TeraStation
  • Parts: Manufacturers Limited Warranty: 3 Year / Parts Only
  • Model #: OP-HD3.0T/4K-3Y
  •  
  • $174.25 
  • $10.35 Shipping
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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 NL35 ST3400832NS 400GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" 24x7 working Hard Drive Bare Drive
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Seagate NL35 ST3400832NS 400GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" 24x7 working Hard Drive Bare Drive
  • Average Seek Time: 8ms
  • Average Write Time: 9ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Model #: ST3400832NS
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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:

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
1/22/2026 4:08:37 PM
Perfect 28TB NAS Drives Great For UGREEN Plex

“ One drive is my primary Plex/media volume, the other is my internal backup. ”

Seagate IronWolf Pro ST28000NT000 28TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive