• In Stock
  • Sold by Newegg
  • Make an Offer
  • New
  • Combo Deals Only
Brands
Show More
Price
Show More
Capacity
Interface
Show More
RPM
Show More
Cache
Form Factor
Usage
Show More
Sold by
All Top Brands
Availability
Condition
Current Promotion
Useful Links
Customer Ratings
  • Peripheral Discounts
  • Featured Brands

    See Deals from Western DigitalSee Deals from SeagateSee Deals from SAMSUNG
Sort By:
View:
Seagate Exos 7E10 ST8000NM018B 8TB 7200 RPM 256MB Cache SAS 12Gb/s 3.5" Internal Hard Drive, 512e/4KN
Quick View
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
ASKAsk me
Seagate BarraCuda ST3000DM007 3TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives
Quick View
in 30 days
Seagate BarraCuda ST3000DM007 3TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drives
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 20.20mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST3000DM007
ASKAsk me
Seagate Exos X16 16TB Enterprise HDD 12Gb/s SAS 512e/4Kn 7200 RPM 256MB Cache 3.5" Internal Hard Drive ST16000NM002G
Quick View
Seagate Exos X16 16TB Enterprise HDD 12Gb/s SAS 512e/4Kn 7200 RPM 256MB Cache 3.5" Internal Hard Drive ST16000NM002G
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Model #: ST16000NM002G
MaxDigitalData 3TB 32MB Cache 5700PM SATA 6.0Gb/s 3.5" Internal Surveillance CCTV DVR Hard Drive (MD3000GSA3257DVR) - 2 Year Warranty
Quick View
  •  
  • $98.99 
  • Free Shipping
HGST 0F22408 - 4TB 3.5" SATA 7,200 RPM 6Gb/s Hard Drive
Quick View
  •  
  • $190.10 
  • Free Shipping
Western Digital WD Green WD20EADS 2TB 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive Bare Drive
Quick View
ASKAsk me
WD Red Plus 8TB NAS Hard Disk Drive - 5640 RPM Class SATA 6Gb/s, CMR, 128MB Cache, 3.5 Inch - WD80EFZX
Quick View
Western Digital
WD Red Plus 8TB NAS Hard Disk Drive - 5640 RPM Class SATA 6Gb/s, CMR, 128MB Cache, 3.5 Inch - WD80EFZX
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD80EFZX
  •  
  • $454.45 
ASKAsk me
WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 16MB Cache 3.5 Inch - WD5000AAKX
Quick View
WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 16MB Cache 3.5 Inch - WD5000AAKX
  • Average Latency: 6Gb/s
  • Height (maximum): 25.40mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD5000AAKX
ASKAsk me
Seagate ST4000NM0125 ST4000NM0125 4 TB Hard Drive - 3.5" Internal - SAS (12Gb/s SAS)
Quick View
  •  
  • $85.00 
  • Free Shipping
Dell/Seagate Exos X16 ST12000NM006J 12TB 7.2K RPM SAS 12Gb/s 512e 3.5in Refurbished HDD
Quick View
Seagate
Refurbished Dell/Seagate Exos X16 ST12000NM006J 12TB 7.2K RPM SAS 12Gb/s 512e 3.5in Refurbished HDD
  • Brand: Dell/Seagate
  • Series: Exos X16
  • Capacity: 12TB
  • RPM: 7200 RPM
  • Model #: 0M1C0T-NOTRAY
  •  
  • $339.00 
  • Free Shipping
WD Purple Pro WD142PURP 14TB 7200 RPM 512MB Cache SATA 3.5" Internal Hard Drive
Quick View
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
  • $550.00 - $610.00
ASKAsk me
WD Red Plus 8TB CMR NAS Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 128MB Cache, 3.5" - WD80EFZZ
Quick View
WD Red Plus 8TB CMR NAS Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 128MB Cache, 3.5" - WD80EFZZ
  • Recording Technology: CMR
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD80EFZZ
36RH9 ST1200MM0088 Dell 1.2TB 10K 6Gbps 128MB Cache 2.5" SAS HDD Hard Drive
Quick View
  •  
  • $58.00 
  • Free Shipping
ASKAsk me
XY986 2TB 7200RPM SAS 2.5Inch Dell Hard Drive
Quick View
DELL
Refurbished XY986 2TB 7200RPM SAS 2.5Inch Dell Hard Drive
  • Part Number: XY986
  • Parts: 30 Days
  • Labor: 30 Days
  • Model #: XY986
seagate ironwolf st6000vn001 6 tb hard drive - 3.5" internal - sata (sata/600)
Quick View
  •  
  • $275.10 
  • Free Shipping
WD10EZEX Western Digital 1TB 7.2K RPM 6Gbps 3.5" SATA DESKTOP HDD Hard Drive
Quick View
  •  
  • $90.00 
  • Free Shipping
F9NWJ AL15SEB24EQY Dell 2.4TB 10K 12G 2.5" SAS Hard Drive
Quick View
ASKAsk me
WD Black 8TB Performance Internal Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" - WD8001FZBX
Quick View
WD Black 8TB Performance Internal Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" - WD8001FZBX
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.10mm
  • Width (maximum): 101.60mm
  • Length (maximum): 147.00mm
  • Model #: WD8001FZBX
  •  
  • $375.00 
Seagate IronWolf Pro 12TB ST12000NE0008 NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST12000NE0008
Quick View
Seagate IronWolf Pro 12TB ST12000NE0008 NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST12000NE0008
  • Average Latency: 4.16ms
  • NAND Flash Memory Type: Hard Drive
  • Recording Technology: CMR
  • Model #: ST12000NE0008.
Western Digital WD241PURP 24 TB Hard Drive - 3.5" Internal - SATA (SATA/600) Video - Surveillance Systems, Cloud Storage Device Supported
Quick View
Western Digital
Western Digital WD241PURP 24 TB Hard Drive - 3.5" Internal - SATA (SATA/600) Video - Surveillance Systems, Cloud Storage Device Supported
  • Brand: Western Digital
  • Capacity: 24TB
  • Interface: SAS 6Gb/s
  • Part Number: WD241PURP
  • Model #: WD241PURP
ASKAsk me
Seagate Cheetah 15K.7 ST3600057SS 600GB 15000 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Enterprise Hard Drive Bare Drive
Quick View
Seagate Cheetah 15K.7 ST3600057SS 600GB 15000 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Enterprise Hard Drive Bare Drive
  • Brand: Seagate
  • Series: Cheetah 15K.7
  • Model: ST3600057SS
  • Capacity: 600GB
  • Model #: ST3600057SS
ASKAsk me
Seagate Exos X12 12TB SAS 12Gb/s 3.5in Enterprise HDD ST12000NM0027 2A1201-001 OEM
Quick View
WL 500GB 8MB Cache SATA2 (3.0Gb/s) 3.5" Internal Hard Drive (For Desktop PC & CCTV DVR) - OEM w/1 Year Warranty
Quick View
WL 500GB 8MB Cache SATA2 (3.0Gb/s) 3.5" Internal Hard Drive (For Desktop PC & CCTV DVR) - OEM w/1 Year Warranty
  • Parts: 1 Year Warranty from Reseller
  • Labor: 1 Year Warranty from Reseller
  • Model #: WL500GSA854
  •  
  • $29.99 
  • Free Shipping
Dell G5DM2 - Dell 2TB 2.5" Nearline SAS 7.2K 12Gb/s Hard Drive
Quick View
DELL
Dell G5DM2 - Dell 2TB 2.5" Nearline SAS 7.2K 12Gb/s Hard Drive
  • Average Latency: 6Gb/s
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: G5DM2
Seagate IronWolf Pro 10TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive ST10000NE0004
Quick View
Seagate IronWolf Pro 10TB NAS Hard Drive 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive ST10000NE0004
  • Average Latency: 4.16ms
  • Height (maximum): 26.11mm
  • Width (maximum): 101.85mm
  • Length (maximum): 146.99mm
  • Model #: ST10000NE0004
HP EG0300FAWHV 300Gb 10000Rpm Sas 6Gbits Dual Port Sff 2.5Inch Hard Disk Drive With Tray
Quick View
HP EG0300FAWHV 300Gb 10000Rpm Sas 6Gbits Dual Port Sff 2.5Inch Hard Disk Drive With Tray
  • Parts: 30 DAYS WARRANTY
  • Labor: 30 DAYS WARRANTY
  • Model #: EG0300FAWHV
0-HOURS Western Digital WD10EZEX 1TB 7.2K RPM 6Gb/s 3.5" SATA HDD Hard Drive
Quick View
  •  
  • $99.00 
  • Free Shipping
WD9001BKHG-18D22V1 Dell 900GB 10K SAS 6G SFF Hard Drive
Quick View
Seagate IronWolf 6TB NAS Hard Drive 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive ST6000VN0041
Quick View
Seagate IronWolf 6TB NAS Hard Drive 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive ST6000VN0041
  • NAND Flash Memory Type: Hard Drive
  • Height (maximum): 26.11mm
  • Width (maximum): 101.60mm
  • Length (maximum): 146.99mm
  • Model #: ST6000VN0041
ASKAsk me

Desktop internal hard drives store operating systems, system files, software and individual files. They can offer anywhere from 500GB of storage up to 8TB or more and come with a variety of interfaces. Although most internal drives are 3.5in., some devices use a smaller 2.5in. form factor. Smaller and larger physical sizes are rare but do exist. Also, consider the speed of the drive. Internal hard drives for desktop computers tend to run at 7,200 revolutions per minute (RPM) but faster read-write speeds minimize waiting time. Hard drives with speeds of up to 15,000 RPM are available. Finally, memory cache is the amount of memory that can be active at any given time. A larger cache is important if you work with multiple large files at once.

Improve Your Computer's Performance with a New Hard Drive

You might not be concerned about storage space when you buy a new PC, but the hard drive will fill will with files and software. A new desktop internal hard drive can replace an existing drive that has reached maximum capacity. Alternatively, if your motherboard has a spare bay, you can add a second or additional device to expand storage. An internal HDD for PCs is easy to install, has greater capacity and speed than an external device and comes with multiple storage options.

Store All Your Data with Large Capacity Drives

Every piece of software you install, every song you save, every video you download takes up storage space, which can slow down a computer. A 720p movie takes up approximately 8GB, while a 4k video can consume as much as 100GB of a desktop internal hard drive. Even the Windows 10 operating system requires 15GB. A 500GB hard drive can be useful for storing files while you're on the move before transferring them to a larger drive if you don't have a personal cloud device or portable hard drive. For everyday and ongoing storage, this size drive will quickly fill up. Desktop internal hard drives offer the storage of up to 16TB in some cases, providing plenty of space for software and files.

Ensure Compatibility by Choosing the Right Interface

The most commonly used standards for connecting a desktop internal hard drive to a motherboard are SATA and SAS. Determine the motherboard's interface and ensure that you match this when buying a new drive to ensure compatibility and to avoid having to use an adapter. Check the label off the drive you are replacing or look at the manufacturer guidelines for your motherboard.

Access Data Quicker with a Fast SATA Internal Hard Drive

The speed the disk platters spin determines how quickly information can be retrieved from the drive. It is common for external hard drives to have a speed of 5,000 RPM because this draws less power and makes minimal noise. Other hard drive designs have a speed of up to 15,000 RPM, depending on the model.

Bestselling Desktop Internal Hard Drives Reviews:

Keith V.
4/9/2026 4:20:16 PM
High Capacity Plug and Play Drive

“ SATA so it plugs right into my old media server ”

Seagate BarraCuda ST24000DM001 24TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive
Perry K.
3/26/2026 7:05:57 AM
Seagate Barracuda 2TB Hard Drive

“ Received and installed new Seagate Hard Drive in older Dell Inspiron PC. ”

Seagate BarraCuda ST2000DM008 2TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Hard Drive Bare Drive
Anonymous
1/17/2026 7:23:35 PM
Works great if not DOA

“ I initially purchased two drives to replace two old WD 6TB drives (one died before Xmas) in a WD NAS. ”

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX