• In Stock
  • Sold by Newegg
  • Make an Offer
  • New
  • Combo Deals Only
Brands
Show More
Price
Show More
Capacity
Interface
Show More
RPM
Show More
Cache
Form Factor
Usage
Show More
Sold by
All Top Brands
Availability
Condition
Current Promotion
Useful Links
Customer Ratings
  • Peripheral Discounts
  • Featured Brands

    See Deals from Western DigitalSee Deals from SeagateSee Deals from SAMSUNG
Sort By:
View:
WD Red Plus 3TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD30EFRX
Quick View
WD Red Plus 3TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD30EFRX
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD30EFRX
ASKAsk me
Seagate Constellation ES.3 ST2000NM0033 2TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
Quick View
Seagate Constellation ES.3 ST2000NM0033 2TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST2000NM0033
ASKAsk me
Seagate Constellation ES ST1000NM0011 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
Quick View
Seagate Constellation ES ST1000NM0011 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Average Write Time: 9.5ms
  • Average Latency: 4.16ms
  • Parts: 2 yrs
  • Model #: ST1000NM0011
Seagate 12TB HDD Exos X14 7200 RPM 512e/4Kn SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive (ST12000NM0008)
Quick View
in 30 days
Seagate 12TB HDD Exos X14 7200 RPM 512e/4Kn SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive (ST12000NM0008)
  • NAND Flash Memory Type: SLC
  • Average Latency: 4.16ms
  • Features: 14TB per drive for 40% more petabytes per rack Industry's lowest power and weight for optimum data center TCO Highest 14TB hard drive performance with enhanced caching, making it perfect for big data applications Hyperscale SATA model tuned for large data transfers PowerBalance feature optimizes IOPS/Watt Helium sealed-drive design with no porosity and uniform density Superior
  • Usage: For Enterprise Storage
  • Model #: ST12000NM0008
WD Purple WD121PURZ 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
Quick View
WD Purple WD121PURZ 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD121PURZ
  • $515.00 - $535.00
ASKAsk me
Seagate IronWolf 16TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST16000VN001
Quick View
Seagate IronWolf 16TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST16000VN001
  • NAND Flash Memory Type: Hard Drives
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST16000VN001
WD Red Plus 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD40EFRX
Quick View
WD Red Plus 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD40EFRX
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD40EFRX
ASKAsk me
Seagate ST18000NM004J Exos X18 ST18000NM004J 18 TB Hard Drive - Internal - SAS (12Gb/s SAS)
Quick View
Seagate
Refurbished Seagate ST18000NM004J Exos X18 ST18000NM004J 18 TB Hard Drive - Internal - SAS (12Gb/s SAS)
  • Part Number: ST18000NM004J
  • NAND Flash Memory Type: SLC
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: ST18000NM004J
Seagate Enterprise Capacity 3.5'' HDD 8TB 7200 RPM 4Kn SATA 6Gb/s 256MB Cache Internal Hard Drive ST8000NM0045
Quick View
Seagate Enterprise Capacity 3.5'' HDD 8TB 7200 RPM 4Kn SATA 6Gb/s 256MB Cache Internal Hard Drive ST8000NM0045
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST8000NM0045
Seagate IronWolf 6TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST6000VN0033
Quick View
Seagate IronWolf 6TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST6000VN0033
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST6000VN0033
WD Purple 6TB Surveillance Hard Disk Drive - 5700 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD60PURZ
Quick View
WD Purple 6TB Surveillance Hard Disk Drive - 5700 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD60PURZ
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD60PURZ
ASKAsk me
Seagate SKYHAWK AI 16TB SATA 6.0Gb/s Internal Hard Drive ST16000VE002
Quick View
Seagate SKYHAWK AI 16TB SATA 6.0Gb/s Internal Hard Drive ST16000VE002
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST16000VE002
WD Gold 4TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD4003FRYZ
Quick View
WD Gold 4TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD4003FRYZ
  • Features: Conquer tough workloads with enterprise-grade WD Gold HDDs. Available in 1TB to 14TB capacities Enhanced reliability with up to 2.5M hours MTBF Specifically designed for use in enterprise-grade data centers and storage systems Improve performance with our vibration protection technology HelioSeal technology delivers high capacities with a low power draw [12TB and
  • Usage: For Enterprise Storage
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: WD4003FRYZ
seagate skyhawk st6000vx001 6tb 3.5" internal hard drive - sata
Quick View
Seagate
seagate skyhawk st6000vx001 6tb 3.5" internal hard drive - sata
  • Height (maximum): 26.11mm
  • Model #: RNAB079HCMBFT
WD Red Plus 6TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD60EFRX
Quick View
WD Red Plus 6TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD60EFRX
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD60EFRX
ASKAsk me
WD Gold WD8005FRYZ 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives
Quick View
WD Gold WD8005FRYZ 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD8005FRYZ
ASKAsk me
WD Gold 26TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 512MB Cache 3.5 Inch - WD261KRYZ
Quick View
WD Gold 26TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 512MB Cache 3.5 Inch - WD261KRYZ
  • Height (maximum): 26.10mm
  • Width (maximum): 147.00mm
  • Length (maximum): 101.60mm
  • Model #: WD261KRYZ
  • $1,250.00 - $1,390.00
ASKAsk me
WD Gold 12TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 512MB Cache 3.5 Inch - WD122KRYZ
Quick View
ASKAsk me
WL 2TB 64MB Cache 5400RPM SATA III (6.0Gb/s) (Low Power & Heavy Duty) 3.5" Internal Hard Drive (NAS & CCTV DVR) - w/ 1 Year Warranty
Quick View
WL 2TB 64MB Cache 5400RPM SATA III (6.0Gb/s) (Low Power & Heavy Duty) 3.5" Internal Hard Drive (NAS & CCTV DVR) - w/ 1 Year Warranty
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: WL2000GSA6454-DVR
  •  
  • $79.99 
  • Free Shipping
Seagate Exos 7E8 8 TB 3.5" SATA 7200rpm Internal Hard Disk Drive ST8000NM004A SED Model
Quick View
Seagate Exos 7E8 8 TB 3.5" SATA 7200rpm Internal Hard Disk Drive ST8000NM004A SED Model
  • NAND Flash Memory Type: Hard Drive
  • Encryption: Encryption
  • Usage: For Enterprise Storage
  • Parts: 5 Years
  • Model #: ST8000NM004A
Seagate BarraCuda ST6000DM003 6TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
Quick View
Seagate BarraCuda ST6000DM003 6TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 6Gb/s
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST6000DM003
Seagate IronWolf 10TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST10000VN0004
Quick View
Seagate IronWolf 10TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST10000VN0004
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST10000VN0004
ASKAsk me
WD Purple 6TB 3.5" SATA Internal Hard Disk Drive WD64PURZ
Quick View
WD Purple 6TB 3.5" SATA Internal Hard Disk Drive WD64PURZ
  • Brand: Western Digital
  • Capacity: 6TB
  • RPM: 5400 RPM
  • Interface: SATA 6.0Gb/s
  • Model #: WD64PURZ
  • $277.40 - $287.26
ASKAsk me
Seagate Enterprise ST2000NX0253 2 TB 2.5" Internal Hard Drive (ST2000NX0253)
Quick View
ST4000NM003A Seagate Exos 7E8 4TB 7.2K RPM SAS 12Gbps 3.5" 256MB HDD NEW
Quick View
ST4000NM003A Seagate Exos 7E8 4TB 7.2K RPM SAS 12Gbps 3.5" 256MB HDD NEW
  • Average Seek Time: 4.16 ms
  • Part Number: ST4000NM003A
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: ST4000NM003A-NEW
  •  
  • $165.00 
  • Free Shipping
ASKAsk me
Synology HAT3320-20T 20TB 7200 RPM 1GB Cache SATA 3.5" Synology HAT3320 20TB Plus Series SATA HDD 3.5"
Quick View
Synology HAT3320-20T 20TB 7200 RPM 1GB Cache SATA 3.5" Synology HAT3320 20TB Plus Series SATA HDD 3.5"
  • Brand: Synology
  • Capacity: 20TB
  • RPM: 7200 RPM
  • Interface: SATA
  • Model #: HAT3320-20T
  •  
  • $639.99 
  • Free Shipping
Western Digital RE4 WD1003FBYX 1 TB 3.5' Internal Hard Drive
Quick View
Western Digital
Western Digital RE4 WD1003FBYX 1 TB 3.5' Internal Hard Drive
  • Parts: 5 Year Limited
  • Model #: WD1003FBYX-01Y7B1
Seagate BarraCuda 7200.7 ST340014A 40GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
Quick View
Seagate BarraCuda 7200.7 ST340014A 40GB 7200 RPM 2MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive
  • Average Seek Time: 8.5ms
  • Parts: 1 year limited
  • Labor: 1 year limited
  • Model #: ST340014A
  •  
  • $95.10 
  • Free Shipping

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:

Keith V.
4/9/2026 4:20:16 PM
High Capacity Plug and Play Drive

“ SATA so it plugs right into my old media server ”

Seagate BarraCuda ST24000DM001 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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
1/17/2026 7:23:35 PM
Works great if not DOA

“ I initially purchased two drives to replace two old WD 6TB drives (one died before Xmas) in a WD NAS. ”

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX