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HCS721050CLA362 0F13836 Hitachi 500GB 7200RPM 3Gbps 3.5" SATA HDD Hard Drive
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  • $37.96 
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Dell 8WP8W 600GB SAS 10K 6GBPS 2.5" Drive 0B25656 HUC106060CSS600
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  • $80.00 
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Dell RMCP3 1.2TB SAS 10K 6GBPS 2.5" Drive ST1200MM0007 1DA200-150
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  • $88.00 
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HTS721010A9E630 HGST 0J47783 7K1000 1TB 7.2K RPM 6Gb/s 2.5" SATA HDD Hard Drive
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HUS153014VLS300 Hitachi 147GB 15K RPM 3Gbps 3.5" SAS HDD Hard Drive 0B22178
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  • $69.96 
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Hard Drives
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Hard Drives
  • Model #: 2F020L0
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  • $179.10 
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Dell X79H3 10000 RPM SAS 6Gb/s 2.5" Internal Notebook Hard Drive
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  • $54.99 
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Dell 2MJ55 4TB 7.2K 3.5 SATA HDD
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DELL
Dell 2MJ55 4TB 7.2K 3.5 SATA HDD
  • Model #: 9845647387989
Dell U738K-R 1TB 7200 RPM SAS 6Gb/s 3.5" Internal Hard Drive
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  • $89.99 
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01EJ596 01EJ952 01EJ954 IBM 3.84TB MLC 12Gbps 2.5" SAS Solid State Drive
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WD WD20PURZ Purple 2TB Surveillance Hard Drive
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Hitachi HUS156060VLS600 0B23663 600GB 15K RPM 6Gb/s 3.5" SAS HDD Hard Drive
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Dell 161-BBSZ 20TB 7.2K SATA ISE 6Gbps 512e 3.5in Hot-plug Hard Drive
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  • $756.00 
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Dell 161-BBSX 20TB 7.2K SATA ISE 6Gbps 512e 3.5in Hot-plug Hard Drive
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  • $756.00 
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LOT OF 10 - Dell U738K ST31000424SS 1TB 7200RPM 6Gbps NL 3.5" SAS HDD Hard Drive
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  • $790.00 
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Dell 4RYFR - Dell 1.2TB 2.5" SAS 10K 6Gb/s Hard Drive
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  • $311.19 
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Hp 633982-002 Workstation
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HP
Hp 633982-002 Workstation
  • Model #: 633982-002
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  • $275.89 
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HPE 8TB 12G SAS 7.2K LFF 512e SC MDL HDD
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LOT OF 10 - Dell W347K ST3600057SS 600GB 15K RPM 6Gb/s 3.5" SAS HDD HARD DRIVE
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  • $930.00 
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Maxtor 8d147j0 147GB 10000 RPM SATA 3.5" Hard Drives Bare Drive
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  • $80.79 
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WD RE WD3001FYYG 3 TB 3.5" Internal Hard Drive
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  • $152.10 
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LOT OF 10-Dell V8FCR 0V8FCR WD1003FBYX 1TB 7.2KRPM 3Gb/s 3.5"SATA HDD Hard Drive
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  • $950.00 
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745GC ST9300605SS Dell 300GB 10K RPM 6Gb/s 2.5"SAS SERVER HDD HardDrive W/R Tray
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  • $24.95 
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N0Y4N RETAIL Dell 600GB 10K RPM SAS 12Gbps 512n 2.5in Hot-plug Drive
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  • $185.00 
LOT OF 10 - Dell W348K HUS156060VLS600 600GB 15K RPM 6Gb/s 3.5" SAS Hard Drive
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  • $965.00 
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626162-001 625609-B21 HP 1TB 7.2K RPM 3Gb/s MDL HotPlug 2.5" SATA HDD Hard Drive
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  • $59.95 
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THGNN ST4000NM0033 Dell 4TB 7.2K RPM 6Gb/s 3.5" SATA SERVER HDD Hard Drive
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  • $255.00 
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LOT OF 10 - R749K ST3450857SS Dell 450GB 15K RPM 6Gb/s 3.5" SAS HDD Hard Drive
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  • $930.10 
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43X0805 43X0802 42C0242 IBM 300GB 15K RPM 3Gb/s 3.5" HS SAS Hard Drive W/Caddy
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  • $35.95 
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432341-B21 432401-002 HP 750GB 7.2K RPM 1.5Gb/s 3.5" SATA HDD Hard Drive W/Caddy
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  • $75.00 
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DataLocker K350 64 GB Encrypted USB Drive
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  • $384.99 
HP 2 TB 3.5" Internal Hard Drive - SAS - 7200rpm - Hot Pluggable - 1 Pack
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  • $70.49 
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652597-S21 512544-003 HP 72GB 15K RPM 3Gb/s 2.5" SAS SP HOTSWAP Hard Drive
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  • $19.95 
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Dell 400-AGDB - Dell 4TB 3.5" Nearline SAS 7.2K 6Gb/s Hard Drive
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  • $400.00 
Hitachi 250GB 5400RPM 2.5' SATA HTS545025B9A300
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  • $37.89 
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507616-B21 507613-002 HP 2TB 7200RPM 6Gbps Hot Swap 3.5" SAS HDD Hard Drive
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  • $39.95 
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622598-002 458928-B21 HP 500GB 7.2K 3G 3.5" SATA Hard Drive W/Caddy
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  • $48.95 
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652757-B21 653948-001 HP 2TB 7.2K RPM 6Gb/s 3.5" SAS SERVER HDD Hard Drive
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  • $58.00 
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Fujitsu 160GB 5400 RPM SATA 1.5Gbps 2.5 Inch 8MB Cache Hard Drive - CA06889-B42700AP
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  • $104.00 
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LOT OF 10 - Dell FVX7C ST2000NX0433 2TB 7200RPM 12Gbps 2.5" SAS HDD Hard Drive
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  • $899.95 
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656107-001 655708-B21 HP 500GB 7200RPM 6Gbps 2.5" SATA HDD Hard Drive W/Caddy
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  • $28.95 
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Hitachi HTS723232A7A364 SATA 320 GB 7200 RPM 2.5 in Hard Drive FF5
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LOT OF 10 - XX518 ST3146356SS Dell 146GB 15000RPM 3Gbps 3.5" SAS HDD Hard Drive
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  • $250.00 
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IBM 44W2245 600 GB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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  • $75.10 
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HPE 652766-B21 3 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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  • $46.00 
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26K5141 90P1322 IBM 73GB 15K RPM U320 SCSI 3.5" HARD DRIVE W/Caddy
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HPE 627195-001 300 GB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
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  • $70.00 
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HPE 718162-B21 1.20 TB Hard Drive - 2.5" Internal - SAS (6Gb/s SAS)
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  • $49.00 
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HDD_BO G5 3.5 4TB 7.2K ES SATA 6GBPS HS
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  • $210.10 
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461137-B21 461134-002 HP 1TB 7.2K 3Gb/s 3.5" SAS Hard Drive DB1000BABFF W/Caddy
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  • $55.96 
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Lot of 5 WXPCX Dell POWEREDGE 1.2TB 10K RPM 12Gb 2.5" SAS SERVER HDD Hard Drive
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  • $275.00 
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IBM 49Y1874  2Tb 7200Rpm 3.5Inch Nl Sas 6Gbps Hard Drive With Tray
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  • $40.10 
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Dell K2P5K 8 TB Hard Drive - 3.5" Internal - SAS (12Gb/s SAS)
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  • $275.00 
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Dell 400-AIRE 8 TB Hard Drive - 3.5" Internal - SAS (6Gb/s SAS)
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  • $275.00 
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2G4HM Genuine DELL 2TB 3.5 7.2K 6G LFF SATA HDD WD2003FYYS 02G4HM tray server
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  • $47.95 
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Dell 400-ALPR - Dell 4TB 3.5" Nearline SAS 7.2K 12Gb/s Hard Drive
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  • $400.00 
Dell 400-AFZQ - Dell 4TB 3.5" Nearline SAS 7.2K 6Gb/s Hard Drive
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  • $400.00 
9EB004-044 300GB 10000RPM Fibre Channel 3.5Inch HP Hard Drive
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  • $75.00 
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HPE 286776-B22 36.40 GB Hard Drive - 3.5" Internal - SCSI (Ultra320 SCSI)
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  • $48.99 
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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