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Dell 400-AUSL 2.40 TB Hard Drive - 2.5" Internal - SAS (12Gb/s SAS)
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  • $168.95 
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00AJ142 00AJ141 00AJ145 LENOVO 1TB 7200RPM 6Gbps 2.5" SATA SERVER HDD Hard Drive
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HUA722050CLA330 Hitachi 0F11000 500GB 7.2K 3Gbps 32MB 3.5" SATA HDD Hard Drive
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  • $41.96 
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431958-B21 432320-001 431954-003 DG146ABAB4 HP 146GB 10K RPM 3Gbps 2.5" SAS HDD Hard Drive
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  • $24.95 
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49Y1935 49Y1899 49Y1926 IBM SYSTEM STORAGE 300GB 15K 6Gb/s 3.5" SAS Hard Drive
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0B24482 IBM HUS156030VLS600 SYSTEM STORAGE 300GB 15K 6Gb/s 3.5" SAS Hard Drive
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  • $129.95 
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9ZM175-039 ST2000NM0033 IBM 2TB 7.2K RPM 6Gb/s 3.5" SATA SERVER HDD Hard Drive
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  • $168.00 
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HP 657753-002 1Tb 7200 Rpm Lff 3.5Inch Sc Mdl Sata 6Gbps Hard Drive With Tray
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  • $147.25 
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49Y1860 49Y1859 49Y1856 IBM 300GB 15K RPM 6Gbps Hot Swap 3.5" SAS HDD Hard Drive
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39R7350 26K5842 40K1044 IBM 146GB 15K RPM 3Gbps 3.5" SAS SERVER HDD Hard Drive
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49Y1860 49Y1859 49Y1856 IBM 300GB 15K RPM 6Gbps Hot Swap 3.5" SAS HDD Hard Drive
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HP 785411-001 785069-B21 900GB 10K RPM 12Gb/s DP 2.5" SAS SERVER HDD Hard Drive
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  • $159.88 
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0B27256 HUC109060CSS601 Hitachi 600Gb 10K 6Gb/s 2.5" SAS Hard Drive
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  • $48.00 
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0B28953 Hitachi 600GB 15K RPM 12Gbps 2.5" SAS HDD Hard Drive HUC156060CSS200
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  • $56.00 
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90P1318 90P1321 26K5140 IBM 36.4GB 15K RPM Ultra320 SCSI 80-Pin 3.5" Hard Drive
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0B26317 HUS723020ALS640 IBM 2TB 7.2K RPM 6Gb/s 3.5" SAS SERVER HDD Hard Drive
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  • $184.95 
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00NA232 00NA231 00NA235 LENOVO 600GB 15K RPM 12Gb/s 2.5" SAS HDD Hard Drive
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00NA232 00NA231 00NA235 LENOVO 600GB 15K RPM 12Gb/s 2.5" SAS HDD Hard Drive
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HPE 605474-001 1 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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  • $148.09 
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06P5769 06P5767 ST318452LC IBM FESTPLATTE 18GB 15K RPM U160 3.5" SCSI Hard Drive
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HTE725025A9A364 Hitachi 250GB 7200RPM 3Gbps 2.5" SATA LAPTOP Hard Drive
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  • $46.88 
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718164-B21 EG1200FDJYT HP Gen8/Gen9 1.2TB 10K 6Gb/s Dual Port Hot Swap 2.5" SAS Hard Drive
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  • $118.88 
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00NA492 00NA491 00NA495 IBM 1TB 7.2K RPM 12Gb/s NL 2.5" SAS HDD Hard Drive
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49Y6098 49Y6097 49Y6101 IBM 450GB 15000RPM 6Gbps 3.5" SAS SERVER HDD Hard Drive
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504015-001 Hp 72Gb 10K Rpm Hot Plug Sas 2.5 Dual Port Hard Drive
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652749-B21 653954-001 HP 1TB 7.2K RPM 6Gb/s SFF 2.5" SAS SERVER HDD Hard Drive
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00FN209 00FN208 00FN212 LENOVO 4TB 7.2K RPM 12Gb/s G2HS NL 3.5" 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