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WD Purple 2TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD20PURZ
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WD Purple 2TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch WD20PURZ
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD20PURZ
Seagate 18TB Exos X18 7200 RPM SAS 12Gb/s 512e/4Kn 256MB Cache 3.5-Inch Enterprise Hard Drive HDD (ST18000NM004J)
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Seagate 18TB Exos X18 7200 RPM SAS 12Gb/s 512e/4Kn 256MB Cache 3.5-Inch Enterprise Hard Drive HDD (ST18000NM004J)
  • Brand: Seagate
  • Series: Exos X18
  • Capacity: 18TB
  • RPM: 7200 RPM
  • Model #: ST18000NM004J
WD WD43PURZ 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43URZ
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WD WD43PURZ 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43URZ
  • Height (maximum): 26.1mm
  • Width (maximum): 101.6mm
  • Length (maximum): 147mm
  • Model #: WD43PURZ
Lenovo 2TB 3.5" SATA 7200rpm Internal Hard Drive - Hot Swappable 7XB7A00050
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Seagate Exos X16 16TB 7.2K RPM SATA 6Gb/s 512e/4Kn 256MB 3.5" Enterprise HDD - ST16000NM001G
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Refurbished Seagate Exos X16 16TB 7.2K RPM SATA 6Gb/s 512e/4Kn 256MB 3.5" Enterprise HDD - ST16000NM001G
  • Brand: Seagate
  • Capacity: 16TB
  • RPM: 7200 RPM
  • Interface: SATA 6.0Gb/s
  • Model #: ST16000NM001G
  •  
  • $825.00 
  • $50.00 Shipping
ST14000NM002G Seagate Exos X16 14TB 7.2K SAS 12Gbps 3.5" Internal Hard Drive
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Seagate
Refurbished ST14000NM002G Seagate Exos X16 14TB 7.2K SAS 12Gbps 3.5" Internal Hard Drive
  • Average Seek Time: 4.16ms
  • Average Latency: 4.16ms
  • Part Number: ST14000NM002G
  • Parts: 30 Days
  • Model #: ST14000NM002G-ref
  •  
  • $455.00 
  • $50.00 Shipping
WD Purple Pro WD122PURP 12TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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WD Purple Pro WD122PURP 12TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
  • Brand: WD
  • Series: Purple Pro
  • Capacity: 12TB
  • RPM: 7200 RPM
  • Model #: WD122PURP
WD Red Plus 2TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD20EFPX
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WD Red Plus 2TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch - WD20EFPX
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD20EFPX
TOSHIBA N300 HDWG480XZSTA 8TB 7200 RPM 256MB Cache 3.5" NAS Internal Hard Drive
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TOSHIBA N300 HDWG480XZSTA 8TB 7200 RPM 256MB Cache 3.5" NAS Internal Hard Drive
  • NAND Flash Memory Type: Hard Drives
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: HDWG480XZSTA
WD Purple Pro WD101PURP 10TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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WD Purple Pro WD101PURP 10TB 7200 RPM 256MB 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 #: WD101PURP
WD PURPLE PRO 24TB SATA 7200RPM
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Western Digital
WD PURPLE PRO 24TB SATA 7200RPM
  • Parts: 5 Year
  • Model #: WD240PURP
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
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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
  •  
  • $890.00 
  • $50.00 Shipping
TOSHIBA X300 Pro HDWR51GXZSTB 16TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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TOSHIBA X300 Pro HDWR51GXZSTB 16TB 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 #: HDWR51GXZSTB
WD Purple Pro WD121PURP 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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WD Purple Pro WD121PURP 12TB 7200 RPM 256MB 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 #: WD121PURP
WD Purple Pro WD142PURP 14TB 7200 RPM 512MB Cache SATA 3.5" Internal Hard Drive
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WD Purple Pro WD142PURP 14TB 7200 RPM 512MB Cache SATA 3.5" Internal Hard Drive
  • Brand: WD
  • Series: Purple Pro
  • Capacity: 14TB
  • RPM: 7200 RPM
  • Model #: WD142PURP
WD Blue 1TB Desktop Hard Disk Drive - 7200 RPM SATA 6Gb/s 64MB Cache 3.5 Inch - WD10EZEX
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WD Blue 1TB Desktop Hard Disk Drive - 7200 RPM SATA 6Gb/s 64MB Cache 3.5 Inch - WD10EZEX
  • Brand: WD
  • Series: Blue
  • Capacity: 1TB
  • RPM: 7200 RPM
  • Model #: WD10EZEX
TOSHIBA X300 Pro HDWR440XZSTB 4TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
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TOSHIBA X300 Pro HDWR440XZSTB 4TB 7200 RPM 256MB 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 #: HDWR440XZSTB
  •  
  • $227.99 
  • Free Shipping
Seagate Exos 7E10 ST8000NM018B 8TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive, 512e/4KN
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Seagate
Seagate Exos 7E10 ST8000NM018B 8TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive, 512e/4KN
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Model #: ST8000NM018B
Seagate BarraCuda ST1000DM010 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Hard Drive
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Seagate BarraCuda ST1000DM010 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Hard Drive
  • Average Latency: 6Gb/s
  • Height (maximum): 19.99mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST1000DM010
Western Digital Blue WD2500AAKX 250GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Western Digital Blue WD2500AAKX 250GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Height (maximum): 25.40mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD2500AAKX
  •  
  • $50.00 
  • $50.00 Shipping
Seagate Constellation ES ST500NM0011 500GB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
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Seagate Constellation ES ST500NM0011 500GB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive Bare Drive
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Enterprise
  • Parts: 2 YRS
  • Labor: 2 YRS
  • Model #: ST500NM0011
  •  
  • $74.00 
  • $50.00 Shipping
Seagate Enterprise ST2000NX0253 2 TB 2.5" Internal Hard Drive (ST2000NX0253)
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  •  
  • $194.95 
  • $50.00 Shipping
Seagate ST6000DX000 6TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Seagate ST6000DX000 6TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Seek Time: <8.5 µs typical
  • Average Write Time: <9.5 µs typical
  • Average Latency: 4ms
  • Height (maximum): 1.03"
  • Model #: ST6000DX000
Western Digital WD Green WD20EARX 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  •  
  • $155.00 
  • $50.00 Shipping
TOSHIBA DT01ACA100 1TB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
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TOSHIBA DT01ACA100 1TB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.17ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Model #: DT01ACA100
  •  
  • $80.00 
  • $50.00 Shipping
Western Digital RE3 WD5002ABYS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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Western Digital RE3 WD5002ABYS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
  • Average Latency: 4.2ms
  • Parts: 5 years limited
  • Labor: 5 years limited
  • Model #: WD5002ABYS
  •  
  • $95.00 
  • $50.00 Shipping
Western Digital WD Green WD20EADS 2TB 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  •  
  • $111.00 
  • $50.00 Shipping
Seagate Exos X16 14TB 7200 RPM SATA 6Gb/s 3.5-Inch Enterprise Hard Drive (ST14000NM001G)
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Seagate Exos X16 14TB 7200 RPM SATA 6Gb/s 3.5-Inch Enterprise Hard Drive (ST14000NM001G)
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Model #: ST14000NM001G
Seagate Enterprise Capacity 3.5'' HDD 4TB 7200 RPM 512e SAS 12Gb/s 128MB Cache Internal Hard Drive ST4000NM0125
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Seagate Enterprise Capacity 3.5'' HDD 4TB 7200 RPM 512e SAS 12Gb/s 128MB Cache Internal Hard Drive ST4000NM0125
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.85mm
  • Model #: ST4000NM0125
  •  
  • $200.00 
  • $50.00 Shipping
Seagate Exos X16 ST16000NM004G 16TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Hard Drives, 512E/4KN, SED
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Seagate
Seagate Exos X16 ST16000NM004G 16TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Hard Drives, 512E/4KN, SED
  • Average Latency: 4.16ms
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 147.00mm
  • Model #: ST16000NM004G
  •  
  • $705.00 
  • $50.00 Shipping
Seagate Cheetah 15K.7 ST3300657SS 300GB 15000 RPM SAS 6Gb/s 3.5" Internal Hard Drive
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Seagate Cheetah 15K.7 ST3300657SS 300GB 15000 RPM SAS 6Gb/s 3.5" Internal Hard Drive
  • Average Seek Time: 3.4ms
  • Average Write Time: 3.9ms
  • Average Latency: 2ms
  • NAND Flash Memory Type: Server
  • Model #: ST3300657SS

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