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Dell YP777 - 500GB 3.5" SAS 7.2K 3Gb/s HS Hard Drive
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  • $289.19 
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Fujitsu   MHZ2250BH G2 250GB 2.5" SATA II Laptop Hard Drive
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  • $50.00 
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WD2500BEVS Western Digital SCORPIO 250GB 5400RPM 1.5Gbps 2.5" SATA Hard Drive
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  • $65.00 
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WD1600BJKT Western Digital J165G 160GB 7200RPM 3Gbps 2.5" SATA Hard Drive
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  • $28.95 
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WD2502ABYS-18B7A0 Western Digital 250GB 7.2K RPM 3Gbps 3.5" SATA Hard Drive
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  • $41.96 
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Dell 6P85J - Dell 4TB 3.5" SAS 7.2K 6Gb/s Hard Drive
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  • $320.56 
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WD2500BPVT Western Digital VXWV3 250GB 5400RPM 3Gbps 2.5" SATA Hard Drive
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  • $44.00 
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WD3000HLFS Western Digital 300GB 10K 3G 16MB 3.5in SATA Hard Drive
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  • $45.96 
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Dell 6 TB 3.5" Internal Hard Drive
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DELL H8DVC 300GB 15K SFF 2.5 SAS
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T871K| Dell 146GB 15K SAS 2.5" HD
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342-0857 DELL 600GB 10K SAS 2.5 SFF HDD 6Gbps
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695507-008 HP SAS 4TB 3.5" LFF 6G 7.2K RPM Midline (MDL) Hot-Plug HDD 695510-B21
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  • $86.95 
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Dell 6 TB 3.5" Internal Hard Drive
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Lenovo 81y9786 System X 500GB 3.5  7.2k SATA HDD
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LENOVO LEN#7XB7A00049 3.5" 1TB 7.2K SATA 6Gb HDD
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801884-B21 801814-001 HP 2 TB 6G SATA 7.2K 3.5" NHP MidLine HD NEW (0 Hours)
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  • $74.00 
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WD1600AABB Western Digital CAVIAR 160GB 7.2K RPM 2MB 3.5" PATA/IDE Hard Drive
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  • $78.95 
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JGXK2 Dell 480GB SAS 2.5" 12G MLC RI SSD 0JGXK2 Solid State Drive Gen13
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DELL
JGXK2 Dell 480GB SAS 2.5" 12G MLC RI SSD 0JGXK2 Solid State Drive Gen13
  • Model #: JGXK2-PX05SRB04BY-SDFAM83DAB01-0JGXK2-de
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  • $699.00 
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LOT OF 10-Seagate ST2000NM0033 9ZM175 2TB 7.2K RPM 6Gb/s 3.5"SATA HDD Hard Drive
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  • $900.00 
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300GB SAS 2.5" 15K 6G Drive Compatible 400-AESP 400-AEEI
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7779172-B21 765289-003 HPE 800GB MLC 12Gbps 2.5" SAS Solid State Drive (SSD)
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  • $369.95 
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IBM 02PX539 02YC027 02PX742 V5000 2.4TB 10k 12GB 2.5" SAS Hard Drive
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Hitachi HTS725050A7E630 500GB 7.2K 3G 32MB 2.5" SATA Laptop HDD
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  • $60.00 
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LOT OF 10-7T0DW ST9600204SS Dell 600GB 10KRPM 6Gb/s SAS 2.5"SERVER HDD HardDrive
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  • $440.00 
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ST3250824NS Seagate 9BF133-501 NL35.2 250GB 7.2KRPM 3Gb/s 3.5"SATA HDD HardDrive
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  • $45.96 
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HITACHI 320GB 7200RPM 3.5 INCH HARD DRIVE HDT721032SLA380
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  • $70.00 
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LOT OF 10 - HP 695507-001 652753-B21 1TB 7.2K RPM 6Gb/s 3.5" SAS HDD Hard Drive
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  • $529.95 
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LOT OF 10-Seagate ST3450857SS 9FM066 450GB 15K RPM 6Gb/s 3.5" SAS HDD Hard Drive
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  • $935.10 
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3TB SAS 3.5" 7.2K 6G Drive Compatible 342-2336 342-3515
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1TB SAS 3.5" 7.2K 12G Drive Compatible 400-ALQF 400-ALUS
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ST10000NM0256 Dell EXOS X10 10TB 7.2K RPM 12Gb/s 3.5" SAS HDD
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DELL
ST10000NM0256 Dell EXOS X10 10TB 7.2K RPM 12Gb/s 3.5" SAS HDD
  • Model #: YF87J-0YF87J-ST10000NM0256-dell-new-1
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  • $555.00 
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300GB SAS 2.5" 15K 12G Drive Compatible 400-ATII 400-AEEH
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Seagate SAVVIO 15K.2 ST9146852SS 9FU066 146GB 15KRPM 6Gb/s 2.5"SAS HDD HardDrive
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  • $32.00 
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300GB SAS 2.5" 10K 6G Drive Compatible 342-5755
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  • $210.00 
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Dell RMCP3 1.2TB 10k RPM 2.5" 64MB SAS-6Gb/s HDD
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1.8TB SAS 2.5" 10K 12G Hard Drive Compatible GP3FR
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LOT OF 10 - Seagate ST3600057SS 9FN066 600GB 15KRPM 6Gb/s 3.5"SAS HDD Hard Drive
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  • $995.95 
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Dell 400-AMGI - Dell 1.8TB 2.5" SAS 10K 12Gb/s Hard Drive
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  • $360.19 
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120GB 5400 RPM Hard Drives
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HP 507125-B21 146GB 6G PLUG SAS 10K SFF HP (507125B21) (Renewed)
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  • $49.00 
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(AS IS) LOT OF 4 Western Digital WD3202ABYS 320GB 7.2K 3G 3.5" SATA Hard Drive
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  • $190.95 
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Promise Pegasus J2i. HDD SATA 3.5 inch 8TB
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  • $440.03 
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Seagate 9FU066-036 Savvio 15K.2 146GB 15000RPM SAS 6.0Gbps 2.5-Inch Hard Drive
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  • $319.00 
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N5Y85 Dell 2.5" SAS 480GB 12G  MLC MU SSD PX04SVB048 SDFAT03DAA01
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DELL
N5Y85 Dell 2.5" SAS 480GB 12G MLC MU SSD PX04SVB048 SDFAT03DAA01
  • Model #: N5Y85-0N5Y85-PX04SVB048-SDFAT03DAA01-14
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  • $450.00 
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Xx518 146Gb Sas (Serial Attached Scsi) Hard Drives
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Hitachi HUS153073VLS300 73GB SAS Hard Drive, P/N: 0B22201
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  • $54.19 
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Axiom 1 Tb 3.5 Internal Hard Drive - Sata - 7200 Rpm - 64
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146GB SAS 2.5" 15K 6G Drive Compatible 341-9875
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IBM 450 GB 10K 2.5 SAS (ST9450404SS) with cradle 45W7731 (Server)
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  • $135.19 
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8TB SAS 3.5" 7.2K 12G Drive Compatible 463-7471
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KFJ7G Dell 12TB SAS 3.5" 7.2K 12G Server HDD MG07SCA12TEY G14-G16
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DELL
KFJ7G Dell 12TB SAS 3.5" 7.2K 12G Server HDD MG07SCA12TEY G14-G16
  • Model #: KFJ7G-0KFJ7G-dell-new-MG07SCA12TEY-atp

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