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WD RED PRO 4TB SATA 3.5INCH, 256MB
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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
5/8/2026 5:51:22 AM
Worth it!

“ Great hard drives overall! Super happy with my purchase, although pricey - they get the job done and do it well. ”

Seagate IronWolf Pro ST16000NT001 16TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive - OEM
Geoff B.
5/2/2026 8:34:15 AM
great drives used in a synology NAS

“ I am running 4 of these Seagate Ironwolf Pro 12tb drives in a synology NAS. ”

Seagate IronWolf Pro ST12000NT001 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
David B.
4/29/2026 1:39:29 PM
So far so good

“ This drive is fast and huge for my purposes. ”

Seagate IronWolf Pro ST16000NT001 16TB 7200 RPM 256MB Cache 3.5" Internal Hard Drive - OEM
Anonymous
4/24/2026 9:44:50 AM
Synology 4tb disk

“ Good product, so far, will be seeing far this drive is working 5 years from now. ”

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
Anonymous
4/16/2026 6:58:07 AM
great drive for the price i got the 2tb

“ the drive is quiet, vibration free and decent speed. ”

Seagate BarraCuda ST2000DM008 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
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