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ST32000645NS Seagate CONSTELLATION ES.2 2TB 7.2K RPM 6Gb/s 3.5" SATA Hard Drive
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ST500NM0011 Seagate 9YZ162 500GB 7.2K RPM 6Gb/s 3.5"SATA HDD Hard Drive-(0 H0RS)
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  • $55.88 
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ST2000NX0273 Seagate 2TB SAS 2.5" 7.2K 12Gb 128MB Dual Port Hot-Plug Hard Drive
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Seagate ST380013AS 9W2812-351 80GB 7.2K RPM 1.5Gbps 3.5" SATA HDD Hard Drive
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  • $34.96 
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ST31500341AS Seagate BARRACUDA 7200.11 1.5TB 7.2K RPM 3Gbps 3.5" SATA Hard Drive
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  • $69.88 
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0-HOURS Seagate ST1000DM003 1ER162-501 1TB 7200RPM 6Gbps 3.5"SATA HDD Hard Drive
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Seagate ST1000NM0033 9ZM173-003 1TB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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ST2000NM0033 Seagate 9ZM175-038 CONSTELLATION ES.3 2TB 7.2K 6G 128MB 3.5" SATA Hard Drive
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  • $58.00 
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ST1000NM0051 Seagate CONSTELLATION 1TB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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  • $102.88 
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ST3320620AS Seagate 9BJ14G-308 320GB 7200RPM 3Gbps 3.5" SATA HDD Hard Drive
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  • $57.88 
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ST1200MM0007 Seagate 1DA200 1.2TB 10KRPM 6Gb/s 2.5" SAS HDD Hard Drive - (0 HRS)
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  • $49.00 
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ST9320320AS Seagate 488446 MOMENTUS 320GB 5400RPM 3Gbps 2.5" SATA HDD Hard Drive
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  • $49.88 
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ST6000NM0024 Seagate ENTERPRISE 1HT172-038 6TB 7.2K 6G 128MB (512e) 3.5in SATA Hard Drive
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  • $108.95 
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ST1200MM0017 Seagate 1DA210 ENTERPRISE V7 1.2TB 10K RPM 6Gb/s 2.5"SAS Hard Drive
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  • $120.00 
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ST4000NM0034 Seagate 1HT278-001 4TB 7.2K RPM 12Gb/s 3.5" SAS ENTERPRISE Hard Drive HDD V4
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ST9500325AS Seagate 9HH134 500GB 5.4K RPM 3Gb/s 2.5" SATA Laptop HDD Hard Drive
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ST9500423AS Seagate 9RT143 500GB 7.2K RPM 3Gb/s 2.5" SATA Laptop HDD Hard Drive
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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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Seagate ST6000NM0095 6TB 7.2K 12Gbps 256MB Cache 3.5" SAS HDD Hard Drive
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ST1000NC001 Seagate 1DY162-002 1TB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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ST1000VX000 1ES162-500 Seagate 1TB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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ST3000NM0033 Seagate CONSTELLATION 3TB 7200RPM 6Gbps 3.5" SATA HDD Hard Drive
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ST3250310AS Seagate 9EU132 BARRACUDA 250GB 7200RPM 3Gbps 3.5"SATA HDD Hard Drive
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ST9146852SS 9F4066-005 Seagate SAVVIO 15K.2 146GB 15K 6G 16MB 2.5"SAS Hard Drive
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  • $31.88 
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Seagate ST12000NM002G Exos X16 12TB 3.5 12Gb/s SAS 256Mb Hard drive 512E/4KN HDD
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  • $210.00 
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ST33000650SS Seagate 9SM260-090 ES.2 3TB 7200RPM 6Gbps 3.5" SAS Hard Drive
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ST3146755SS 9DK066-050 Seagate CHEETAH T10 146GB 10K 3G 16MB 3.5" SAS Hard Drive
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ST4000NM0023 Seagate 9ZM270 4TB 7200RPM 6Gbps  3.5" SAS HDD Hard Drive
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ST4000NM0023 Seagate 9ZM270 4TB 7200RPM 6Gbps 3.5" SAS HDD Hard Drive
  • Model #: ST4000NM0023-9ZM270-seagate-new-zerohrs
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Seagate Savvio 10K.7 1.20 TB 2.5" Internal Hard Drive ST1200MM0007 (ST1200MM0007)
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0-HOURS ST91000640NS 9RZ168 Seagate 1TB 7.2K RPM 6Gb/s 2.5" SATA HDD 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:

Casey H.
7/21/2025 4:10:23 PM
My "Go To" for HDs

“ These are my "go to" drives for not only internal system drives, but also offloading external storage; using a 4 Bay USB 3.x Drive Cage. ”

Seagate BarraCuda ST4000DM004 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive - OEM