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WD HUH721212AL4200 HGST DC HC520 12TB SAS 12Gbps 7.2K 256MB 3.5" Hard Drive
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Refurbished WD HUH721212AL4200 HGST DC HC520 12TB SAS 12Gbps 7.2K 256MB 3.5" Hard Drive
  • Brand: Western Digital
  • Capacity: 12TB
  • RPM: 7200 RPM
  • Interface: SAS 12Gb/s
  • Model #: HUH721212AL4200
Seagate Enterprise NAS ST6000VN0001 6TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate Enterprise NAS ST6000VN0001 6TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST6000VN0001
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  • $321.10 
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HGST Ultrastar 7K6000 HUS726060AL5210 (0F22791) 6TB 7200 RPM 128MB Cache SAS 12Gb/s 3.5" Enterprise Hard Drive Bare Drive
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HGST Ultrastar 7K6000 HUS726060AL5210 (0F22791) 6TB 7200 RPM 128MB Cache SAS 12Gb/s 3.5" Enterprise Hard Drive Bare Drive
  • Average Seek Time: 7.6ms
  • Average Write Time: 8ms
  • Average Latency: 4.16ms
  • Height (maximum): 26.1mm
  • Model #: 0F22791
Dell VXTPX 1TB NL SAS 2.5" 7200RPM 6GBPS hard drive
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DELL
Refurbished Dell VXTPX 1TB NL SAS 2.5" 7200RPM 6GBPS hard drive
  • Average Seek Time: 8ms
  • Part Number: VXTPX
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: VXTPX
Western Digital 18TB Purple Pro Surveillance Internal Hard Drive - 7200RPM, SATA 6GB/s, 512MB Cache, 3.5" - WD181PURP
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Western Digital
Western Digital 18TB Purple Pro Surveillance Internal Hard Drive - 7200RPM, SATA 6GB/s, 512MB Cache, 3.5" - WD181PURP
  • NAND Flash Memory Type: Hard Drive
  • Usage: For Video Surveillance
  • Parts: 5 Year
  • Model #: WD181PURP-Dup
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  • $999.00 
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WD Red Plus 8TB CMR NAS Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 128MB Cache, 3.5" - WD80EFZZ
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WD Red Plus 8TB CMR NAS Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 128MB Cache, 3.5" - WD80EFZZ
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD80EFZZ
ST6000NM0095 Seagate 6TB 7.2K RPM SAS 12Gbps 3.5" 256MB Internal Hard Drive
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Seagate
Refurbished ST6000NM0095 Seagate 6TB 7.2K RPM SAS 12Gbps 3.5" 256MB Internal Hard Drive
  • Average Seek Time: 4.16 ms
  • Part Number: ST6000NM0095
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: ST6000NM0095-REF
  • $160.00
  •  
  • $140.00 
  • Save: 12%
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SEAGATE EXOS X24 16TB SATA 6Gb/s ISE 3.5inch Hard drive - ST16000NM002H
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WD Black 4TB Performance Desktop Hard Disk Drive - 7200 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD4005FZBX
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WD Black 4TB Performance Desktop Hard Disk Drive - 7200 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD4005FZBX
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: CMR
  • Features: Inspiring performance and capacity WD Black performance storage is designed to enhance your PC experience across heavier computing tasks whether you are a digital artist, video editor, photographer, or gamer. Available with an impressive 256MB of DRAM cache on higher capacity models, the WD Black PC drive is optimized for drive
  • Usage: Gaming Hard Drives
  • Model #: WD4005FZBX
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WD RE3 WD2502ABYS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Refurbished WD RE3 WD2502ABYS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: 8.9ms
  • Average Latency: 4.2ms
  • Height (maximum): 25.4mm
  • Width (maximum): 147.0mm
  • Model #: WD2502ABYS
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  • $18.00 
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WD Purple Pro WD141PURP 14TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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WD Purple Pro WD141PURP 14TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD141PURP
WD Red Plus 14TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD140EFFX
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WD Red Plus 14TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD140EFFX
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD140EFFX
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HPE EG002400JWJNN Digitally Signed 512e 2.4TB 10K SAS 12G Sff Sc Ent Hdd F/s
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WD Gold 12TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 512MB Cache 3.5 Inch - WD122KRYZ
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Seagate BarraCuda ST4000DM005 4TB 64MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda ST4000DM005 4TB 64MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Parts: 30 DAYS WARRANTY
  • Model #: ST4000DM005
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WL 160GB 8MB Cache 7200RPM SATA2 3.5" Internal Desktop Hard Drive (For PC/Mac, DELL, Compaq, HP, ASUS, IBM, eMachine, Gateway) - 1 Year Warranty
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  • $19.99 
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Dell DRMYH - Dell 4TB 3.5" Nearline SAS 7.2K 6Gb/s Hard Drive
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DELL
Dell DRMYH - Dell 4TB 3.5" Nearline SAS 7.2K 6Gb/s Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Model #: DRMYH
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 Exos 7E10 ST10000NM018B 10TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive, 512e/4KN
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Seagate
Seagate Exos 7E10 ST10000NM018B 10TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive, 512e/4KN
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Model #: ST10000NM018B
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Seagate (Recertified) Exos X 26TB Internal Hard Drive HDD - 3.5 In CMR SATA 6Gb/s, 7200 RPM, 512MB Cache, 2.5M MTBF (ST26000NM000C)
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Refurbished Seagate (Recertified) Exos X 26TB Internal Hard Drive HDD - 3.5 In CMR SATA 6Gb/s, 7200 RPM, 512MB Cache, 2.5M MTBF (ST26000NM000C)
  • Average Latency: 4.16ms
  • Part Number: ST26000NM000C
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: CMR
  • Model #: ST26000NM000C
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Seagate Desktop HDD ST3000DM001 3TB 7200 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate Desktop HDD ST3000DM001 3TB 7200 RPM 64MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Model #: ST3000DM001
WD Purple 3TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD30PURZ
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WD Purple 3TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD30PURZ
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD30PURZ
WD WD Green WD20EARX 2TB IntelliPower 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive -Manufacture Recertified Bare Drive
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TOSHIBA N300 HDWG440XZSTA 4TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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TOSHIBA N300 HDWG440XZSTA 4TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: HDWG440XZSTA
Seagate 5TB Enterprise Desktop Hard Disk Drive - 7200 RPM SATA 6.0Gb/s 128MB 3.5" ST5000NM0084
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Seagate
Seagate 5TB Enterprise Desktop Hard Disk Drive - 7200 RPM SATA 6.0Gb/s 128MB 3.5" ST5000NM0084
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST5000NM0084
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Seagate ST1000NM0008 1 TB 3.5" SATA 7200rpm Internal Hard Drive
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Seagate ST1000NM0008 1 TB 3.5" SATA 7200rpm Internal Hard Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: SLC
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST1000NM0008
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Western Digital Ultrastar DC HC580 WUH722424ALE604 0F62798 24TB 7.2K RPM SATA 6Gb/s 512e Power Disable 3.5" Recertified Enterprise HDD
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Western Digital
Refurbished Western Digital Ultrastar DC HC580 WUH722424ALE604 0F62798 24TB 7.2K RPM SATA 6Gb/s 512e Power Disable 3.5" Recertified Enterprise HDD
  • Brand: Western Digital
  • Series: Ultrastar DC HC580
  • Capacity: 24TB
  • RPM: 7200 RPM
  • Model #: WUH722424ALE604-0F62798
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  • $589.00 
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F9NWJ AL15SEB24EQY Dell 2.4TB 10K 12G 2.5" SAS Hard Drive
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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