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Seagate IronWolf ST4000VN006 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate IronWolf ST4000VN006 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 20.20mm
  • Width (maximum): 101.85mm
  • Model #: ST4000VN006
Seagate BarraCuda ST4000DM004 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive - OEM
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Seagate BarraCuda ST4000DM004 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive - OEM
  • Height (maximum): 20.17mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Model #: ST4000DM004
Seagate IronWolf 8TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST8000VN004-NE
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Seagate IronWolf 8TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST8000VN004-NE
  • NAND Flash Memory Type: Hard Drives
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: NE-ST8000VN004
WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX
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Seagate BarraCuda ST2000DM008 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
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Seagate BarraCuda ST2000DM008 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
  • Height (maximum): 20.20mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST2000DM008
Seagate IronWolf Pro ST12000NT001 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate IronWolf Pro ST12000NT001 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Brand: Seagate
  • Series: IronWolf Pro
  • Capacity: 12TB
  • RPM: 7200 RPM
  • Model #: ST12000NT001
Seagate IronWolf Pro ST16000NT001 16TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive - OEM
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Seagate IronWolf Pro ST16000NT001 16TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive - OEM
  • Brand: Seagate
  • Series: IronWolf Pro
  • Capacity: 16TB
  • RPM: 7200 RPM
  • Model #: ST16000NT001
WD Red Plus WD60EFPX 6TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives
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in 30 days
WD Red Plus WD60EFPX 6TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: WD60EFPX
Seagate IronWolf Pro ST28000NT000 28TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate IronWolf Pro ST28000NT000 28TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Brand: Seagate
  • Series: IronWolf Pro
  • Capacity: 28TB
  • RPM: 7200 RPM
  • Model #: ST28000NT000
Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Brand: Seagate
  • Series: IronWolf Pro
  • Capacity: 20TB
  • RPM: 7200 RPM
  • Model #: ST20000NT001
Seagate BarraCuda NE-ST8000DM004 8TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda NE-ST8000DM004 8TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: SMR
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Model #: ST8000DM004
Seagate IronWolf Pro ST24000NT002 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate IronWolf Pro ST24000NT002 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Brand: Seagate
  • Series: IronWolf Pro
  • Capacity: 24TB
  • RPM: 7200 RPM
  • Model #: ST24000NT002
WD Gold WD8005FRYZ 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives
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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
WD Red Pro WD142KFGX 14TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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WD Red Pro WD142KFGX 14TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD142KFGX
Seagate BarraCuda ST24000DM001 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate BarraCuda ST24000DM001 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Brand: Seagate
  • Series: BarraCuda
  • Capacity: 24TB
  • RPM: 7200 RPM
  • Model #: ST24000DM001
Western Digital 18TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181KRYZ
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Western Digital 18TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181KRYZ
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD181KRYZ
WD Red Pro WD6005FFBX 6TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives
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WD Red Pro WD6005FFBX 6TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives
  • Brand: WD
  • Series: Red Pro
  • Capacity: 6TB
  • RPM: 7200 RPM
  • Model #: WD6005FFBX
WD Red Plus 12TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch -  WD120EFGX
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WD RED PRO 4TB SATA 3.5INCH, 256MB
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WD RED PRO 4TB SATA 3.5INCH, 256MB
  • Brand: WD
  • Series: Red Pro
  • Capacity: 4TB
  • RPM: 7200 RPM
  • Model #: WD4005FFBX
Western Digital 10TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD103KFBX
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Western Digital 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6Gb/s, CMR, 512MB Cache, 3.5" - WD181KFGX
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Western Digital 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6Gb/s, CMR, 512MB Cache, 3.5" - WD181KFGX
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: WD181KFGX
Seagate IronWolf Pro ST4000NT001 4TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate IronWolf Pro ST4000NT001 4TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST4000NT001
  •  
  • $279.99 
  • $19.99 Shipping
WD Purple Pro WD8002PURP 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive
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WD Purple Pro WD8002PURP 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive
  • Part Number: WD8002PURP
  • Recording Technology: CMR
  • Model #: WD8002PURP
WD Red Pro WD122KFBX 12TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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WD Red Pro WD122KFBX 12TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: WD122KFBX
WD Gold WD4004FRYZ 4 TB Hard Drive 3.5" Internal SATA SATA/600
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WD Gold WD4004FRYZ 4 TB Hard Drive 3.5" Internal SATA SATA/600
  • Brand: WD
  • Series: Gold
  • Capacity: 4TB
  • RPM: 7200 RPM
  • Model #: WD4004FRYZ
Seagate Exos M ST30000NM004K 30TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive
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Seagate Exos M ST30000NM004K 30TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive
  • Brand: Seagate
  • Series: Exos M
  • Capacity: 30TB
  • RPM: 7200 RPM
  • Model #: ST30000NM004K
WD Red Pro WD161KFGX 16TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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WD Red Pro WD161KFGX 16TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Brand: WD
  • Series: Red Pro
  • Capacity: 16TB
  • RPM: 7200 RPM
  • Model #: WD161KFGX
Western Digital 24TB WD Gold Enterprise Class SATA Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD241KRYZ
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Western Digital 24TB WD Gold Enterprise Class SATA Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD241KRYZ
  • Height (maximum): 1.03in
  • Width (maximum): 4.01in
  • Length (maximum): 5.79in
  • Model #: WD241KRYZ
WD Purple 6TB 3.5" SATA Internal Hard Disk Drive WD64PURZ
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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
Toshiba N300 Pro 16TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWG51GUZSVB
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Toshiba N300 Pro 16TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWG51GUZSVB
  • Brand: TOSHIBA
  • Series: N300 Pro
  • Capacity: 16TB
  • RPM: 7200 RPM
  • Model #: HDWG51GUZSVB
  •  
  • $578.99 
  • $7.99 Shipping
WD Gold WD6004FRYZ 6TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives
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WD Gold WD6004FRYZ 6TB 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 #: WD6004FRYZ
WD WD85PURZ 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5"
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Seagate SkyHawk AI ST24000VE002 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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Seagate SkyHawk AI ST24000VE002 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST24000VE002
WD Purple Pro WD221PURP 22TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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WD Purple Pro WD221PURP 22TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD221PURP
WD Blue PC Desktop HDD 8TB
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WD Blue PC Desktop HDD 8TB
  • Height (maximum): 1.03in
  • Width (maximum): 4.00in
  • Length (maximum): 5.79
  • Model #: WD80EAAZ

Internal Hard Drives

Need more storage for your games, images, music and movies? An internal hard drive upgrade or a second drive may be what you are looking for. Internal hard drives are used as main storage in desktop PCs, workstations, and servers. Nowadays, small form factor internal hard drives are used in consumer electronic products like mp3 players and digital cameras as well. Regardless of your application, Newegg.com presents an extensive selection of internal hard drive products for you to choose from, from hard drive manufacturers like Western Digital, Seagate, HItachi, LaCie, Maxtor and others.

Understanding Internal Hard Drive Specifications

When selecting a hard drive, there are two main things to consider: speed and capacity. Budget permitting, always go for the fastest drive you can. Speed is measured using the RPM figure a faster rotational speed means greater performance, especially in games, but may cause greater heat and noise. The capacity, measured in GB (gigabytes), should depend on your own storage requirements. A higher capacity drive will invariably cost more than a lower capacity drive, so a balance must usually be struck between capacity and cost. In addition, the hard drive interface IDE, SATA, or SCSI determine a drives application: IDE and SATA for personal storage and SCSI for enterprise, mission critical storage.

Bestselling Desktop Internal Hard Drives Reviews:

Anonymous
4/24/2026 9:44:50 AM
Synology 4tb disk

“ Installation was simple and the drive has performed well. ”

Synology 4TB HAT3300 Plus Series SATA III 3.5" Internal NAS HDD (HAT3310-4T)
Anonymous
4/22/2026 11:30:39 AM
Delivered very quick and drive is as described.

“ This is the second drive I purchased this week from Newegg. ”

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX
Eric W.
4/17/2026 9:54:02 AM
Never had an issue with Iron Wolf

“ I've been using Iron Wolf drives (Pro and not pro) over the years, and have zero reason to try anything else. ”

Seagate IronWolf 8TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s CMR 3.5" Internal HDD for RAID Network Attached Storage ST8000VN004-NE
Alex A.
4/15/2026 8:31:38 AM
Just works!

“ I bought this for use in an external 4-bay USB drive enclosure to add to 3 older Seagate Compute 8TB drives for a total formatted capacity of 43.6TB. ”

Seagate BarraCuda ST24000DM001 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
Keith V.
4/9/2026 4:20:16 PM
High Capacity Plug and Play Drive

“ I bought this during the holiday deal so assumed there was a chance I got a questionable drive, but this is holding up just fine. ”

Seagate BarraCuda ST24000DM001 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
destruk
4/2/2026 2:08:29 PM
Good if you get one that works?

“ Overall, Im very pleased with this drive and would definitely recommend it. ”

Seagate BarraCuda ST24000DM001 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
Kurt M.
3/2/2026 10:26:59 AM
Great as Usual

“ Hard drive for over 2 weeks no issues ”

Seagate IronWolf ST4000VN006 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
Robert W.
2/20/2026 9:57:19 AM
No issues so far. Happy with drive performance

“ I purchased this on sale to use as an external drive for data storage and backups, though not in a raid or nas environment. ”

WD Red Plus 12TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD120EFGX