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Synology HAT3310 16TB Plus Series SATA III 3.5" Internal NAS HDD (HAT3310-16T)
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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:

Terry P.
6/21/2026 12:50:45 PM
Great so far.

“ Drives arrived in perfect shape and in very little time from my order dates. ”

WD Red Plus 8TB 5640 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives -WD80EFPX
DFW_Tech
6/20/2026 10:23:27 AM
Synology 4TB HAT3300

“ I was able to hot install the new 4TB drive to mirror my existing Synology 4TB HAT3300. ”

Synology 4TB HAT3300 Plus Series SATA III 3.5" Internal NAS HDD (HAT3310-4T)
Dee Lang
6/17/2026 4:43:46 PM
Great Product, Easy To Install And Setup

“ Drive was easy to install and setup. ”

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX
William H.
6/15/2026 6:41:49 AM
Great Drive, very quiet

“ The WD Purple 6TB Surveillance Hard Disk Drive, 5400 RPM, Class SATA, 6GB/S, 256 MB Cache, 3.5-inch, WD63PURZ works perfectly with an NVR. ”

WD Purple 6TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch WD63PURZ
Anonymous
6/11/2026 11:04:07 AM
Still working great over a year later

“ I ordered 2 of these back in early 2025, and they're holding up very well as external storage drives using an HDD bay. ”

Seagate BarraCuda NE-ST8000DM004 8TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
JJ
6/10/2026 9:34:55 PM
Good Drive

“ Been buying seagate HD's for a long time. They are durable and last a while. ”

Seagate Skyhawk 6TB Video Internal HDD – 3.5 Inch SATA 6Gb/s 256MB Cache for (ST6000VX009)
Anonymous
5/8/2026 5:51:22 AM
Worth it!

“ Great hard drives overall! ”

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