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Seagate Exos X18 12TB 7200 RPM SATA 6Gb/s 3.5" Enterprise HDD (ST12000NM000J)
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  • $575.00 
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Seagate Exos X16 ST12000NM002G 12TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Hard Drive, 512E/4KN
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  • $520.00 
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HPE P28352-B21 2.40 TB Hard Drive - 2.5" Internal - SAS (12Gb/s SAS)
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  • $760.99 
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WD Purple Pro WD8001PURP 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive
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  • $425.00 
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  • $410.00 - $425.00
Western Digital RE3 WD2502ABYS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
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  • $50.00 
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  • $45.00 - $50.00

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:

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
Anonymous
2/15/2026 7:08:13 AM
Red Pros are Reliable

“ For NAS units/Unraid/TrueNAS you simply cannot buy a better drive as these are the best compromise/bang-for-buck when considering all features (heat/noise/reliability/speed/etc). ”

Western Digital Red Pro WD260KFGX 26TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" HD OEM
Roger C.
2/13/2026 7:23:11 AM
Works as described

“ 8tb hard drive that works ”

WD Gold WD8005FRYZ 8TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives
James s.
2/4/2026 11:01:00 AM
Great Value - added as spare to my Synology DS1813+

“ So I just made this a spare drive on my NAS. ”

Seagate IronWolf Pro ST24000NT002 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
Blair K.
2/4/2026 9:36:09 AM
great drive

“ I recommend this drive ”

Seagate BarraCuda ST4000DM004 4TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives Bare Drive - OEM
Brian K.
2/3/2026 6:41:12 PM
Amazing density!

“ Highly recommend this 28Tb drive for DAS or NAS ”

Seagate IronWolf Pro ST28000NT000 28TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
Anonymous
1/30/2026 9:00:27 AM
Plug and Play

“ Using this drive with an Orico hard drive enclosure for a Raid setup. ”

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX
Anonymous
1/27/2026 11:15:38 AM
Great Product and Service

“ I ordered a WD hard drive to kick up my pc storage for my photography RAW files. ”

WD Blue 6TB Desktop Hard Disk Drive - 5400 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD60EZAX