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WD Ultrastar DC HC500 0F65672 26TB Hard Drive - 3.5" Internal - SATA (SATA/600) - Conventional Magnetic Recording (CMR) Method Server, Storage Server Device Supported - 7200rpm   0F65672
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  • $925.00 - $950.00
HGST HUS722T1TALA600 - HGST 1TB 3.5" SATA 6Gb/s Hard Drive
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  • $65.00 
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Western WD5000LPSX Digital Black WD5000LPSX 500 GB Hard Drive - 2.5" Internal - SATA (SATA/600)
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  • $44.00 
  • Free Shipping
Buffalo OP-HD2.0N 2TB Hard Drive 3.5" Internal SATA SATA/600 (OP-HD2.0N) - OEM
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Buffalo OP-HD2.0N 2TB Hard Drive 3.5" Internal SATA SATA/600 (OP-HD2.0N) - OEM
  • Brand: BUFFALO
  • Capacity: 2TB
  • Interface: SATA
  • Part Number: OP-HD2.0N
  • Model #: OP-HD2.0N
  • $149.99
  •  
  • $138.99 
  • Save: 7%
  • $12.99 Shipping
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Seagate IronWolf 12TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST12000VN0007
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Seagate IronWolf 12TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST12000VN0007
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST12000VN0007
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WD Black WD8002FZWX 8TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Hard Drives
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WD Black WD8002FZWX 8TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Hard Drives
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD8002FZWX
Hitachi Deskstar 7K1000.B HDT721010SLA360 1 TB 3.5' Internal Hard Drive
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  • $75.00 
  • Free Shipping
7YX58 ST600MM0006 Dell SAVVIO 600GB 10000RPM 6Gbps 2.5" SAS Hard Drive 0 HOURS
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  • $48.88 
  • Free Shipping
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Hitachi HUA721010KLA330 1TB 32MB 7200RPM Enterprise Grade 3.5" SATA2 Hard Drive
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Hitachi HUA721010KLA330 1TB 32MB 7200RPM Enterprise Grade 3.5" SATA2 Hard Drive
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: C8082-121103509136
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  • $100.00 
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Dell 400-AJOS - Dell 300GB 2.5" SAS 10K 12Gb/s Hard Drive
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DELL
Dell 400-AJOS - Dell 300GB 2.5" SAS 10K 12Gb/s Hard Drive
  • Average Latency: 12Gb/s
  • Model #: 400-AJOS
Dell CXKCK - 500GB 7.2K SATA 2.5Inch Hard Drive
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  • $24.13 
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Seagate Constellation ES ST2000NM0001 2TB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
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Seagate Constellation ES ST2000NM0001 2TB 7200 RPM 64MB Cache SAS 6Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Enterprise
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: ST2000NM0001
Seagate Exos X18 ST12000NM004J 12TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Hard Drives
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Seagate
Seagate Exos X18 ST12000NM004J 12TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Hard Drives
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST12000NM004J
HGST Ultrastar He8 HUH728080AL4200 (0F23651) 8TB 7200 RPM 128MB Cache SAS 12Gb/s 3.5" Helium Platform Enterprise Hard Drive Bare Drive
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HGST Ultrastar He8 HUH728080AL4200 (0F23651) 8TB 7200 RPM 128MB Cache SAS 12Gb/s 3.5" Helium Platform Enterprise Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 9ms
  • Average Latency: 4.16ms
  • Height (maximum): 26.1mm
  • Model #: 0F23651
Seagate Constellation ES.3 ST2000NM0033 2TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
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Refurbished Seagate Constellation ES.3 ST2000NM0033 2TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: ST2000NM0033
Seagate ST3250312CS Pipeline HD 250GB SATA Internal Hard Drive
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Seagate
Seagate ST3250312CS Pipeline HD 250GB SATA Internal Hard Drive
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: ST3250412CS
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  • $60.00 
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WD Red Plus 10TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 256MB Cache, 3.5 Inch - WD101EFAX
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WD Red Plus 10TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 256MB Cache, 3.5 Inch - WD101EFAX
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Parts: 3 Year
  • Model #: WD101EFAX
Seagate BarraCuda 7200.7 ST3120026AS 120GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda 7200.7 ST3120026AS 120GB 7200 RPM 8MB Cache SATA 1.5Gb/s 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Latency: 4.16ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: ST3120026AS
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  • $50.00 
  • $10.99 Shipping
HPE 693569-003 600 GB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
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HP
HPE 693569-003 600 GB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
  • NAND Flash Memory Type: SLC
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 693569-003
Dell 1.2TB 10K 12Gbps SAS 2.5 HDD 512n (ME) (G2G54-CR)
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DELL
Dell 1.2TB 10K 12Gbps SAS 2.5 HDD 512n (ME) (G2G54-CR)
  • Brand: Dell
  • Model: ST1200MM0099, YMVPP, 400-ATJM
  • Capacity: 1.2TB
  • RPM: 10000 RPM
  • Model #: 011110509437
JN957 0JN957 HUA721050KLA330 Dell 500GB 7.2K RPM 3Gb/s 3.5" SATA HDD Hard Drive
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  • $72.88 
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MDD MDD18TSATA25672DVR 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive for Surveillance
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Refurbished MDD MDD18TSATA25672DVR 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive for Surveillance
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Parts: 5 Years
  • Model #: MDD18TSATA25672DVR
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  • $439.99 
  • Free Shipping
HP 693648-B21 1.2TB 10000 RPM SAS 6Gb/s 2.5" Internal Hard Drive Bare Drive
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HP
HP 693648-B21 1.2TB 10000 RPM SAS 6Gb/s 2.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: 693648-B21
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  • $77.00 
  • Free Shipping
ST2000NM0033 Seagate 9ZM175-038 2TB 7.2K RPM 6Gb/s 3.5" SATA HDD Hard Drive
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Toshiba MG03ACA MG03ACA100 1 TB 3.5" Internal Hard Drive
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Toshiba MG03ACA MG03ACA100 1 TB 3.5" Internal Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: MG03ACA100

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