Internal Hard Drives
WD 18TB Purple Pro 7200 rpm SATA III 3.5" Internal Surveillance Hard Drive (Retail)
- 18TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 512MB Cache
QNAP Seagate EXOS 3.5" Enterprise HDD SATA 7200 RPM NAS - 24TB
Seagate 8TB BarraCuda SATA III 3.5" 5400 rpm Internal HDD (OEM Packaging, 2-Pack)
- 8TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 GB/s Interface
- 256MB Cache
Toshiba 22TB N300 7200 rpm SATA III 3.5" Internal NAS HDD
- 22TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 1GB Cache
WD 4TB Red Plus 5400 rpm SATA III 3.5" Internal NAS HDD (4-Pack)
- 4TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 128MB Cache
Lexar 2TB Professional NM1090 PRO PCIe 5.0 M.2 Internal SSD
- 2TB Storage Capacity
- M.2 2280 Form Factor
- PCIe 5.0 x4 Interface
- Sequential Reads up to 14,000 MB/s
WD 22TB Ultrastar 7200 rpm SATA 3.5" Internal Data Center HDD (OEM Packaging)
- 22TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 512MB Cache
SanDisk 2TB Optimus GX 7100M NVMe PCIe 4.0 M.2 Internal SSD
- 2TB Storage Capacity
- M.2 2230 Form Factor
- PCIe 4.0 x4 / NVMe 2.0 Interface
- Sequential Reads up to 7250 MB/s
SanDisk 2TB Optimus GX 7100 NVMe PCIe 4.0 M.2 Internal SSD
- 2TB Storage Capacity
- M.2 2280 Form Factor
- PCIe 4.0 x4 / NVMe 2.0 Interface
- Sequential Reads up to 7250 MB/s
Toshiba 20TB X300 Performance 3.5" CMR Internal Hard Drive
- 20TB Capacity
- 3.5" Form Factor
- 7200 rpm Rotational Speed
- 512MB Cache
WD 22TB Ultrastar DC HC570 7200 rpm SAS-3 3.5" Internal Data Center HDD
- 22TB Storage Capacity
- 3.5" Form Factor
- SAS-3 12 Gb/s Interface
- 512MB Cache
Toshiba 20TB N300 PRO 7200 rpm SATA III 3.5" Internal NAS HDD
- 20TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 1GB Cache
Toshiba 18TB X300 Pro Performance 3.5" CMR Internal HDD
- 18TB Capacity
- 3.5" Form Factor
- 7,200 rpm Rotational Speed
- 512MB Cache
WD 8TB Purple Pro 7200 rpm SATA III 3.5" Internal Surveillance Hard Drive (Retail, 2-Pack)
- 8TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 256MB Cache
WD 8TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD (2-Pack)
- 16TB Storage Capacity (2 x 8TB)
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 256MB Cache
WD 20TB Gold 7200 rpm SATA III 3.5" Internal Enterprise HDD
- 20TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 512MB Cache
WD 20TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD
- 20TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 512MB Cache
Silicon Power 4TB Endura ES75 NVMe PCIe 4.0 M.2 Internal SSD
- 4TB Storage Capacity
- M.2 2280 Form Factor
- PCIe 4.0 x4 Interface
- Max Read Speeds up to 7000 MB/s
Toshiba 20TB X300 Pro Performance 3.5" CMR Internal HDD
- 20TB Capacity
- 3.5" Form Factor
- 7,200 rpm Rotational Speed
- 512MB Cache
WD 2TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD (4-Pack)
- 8TB Storage Capacity (4 x 2TB)
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 64MB Cache
Seagate 16TB Exos X24 7200 rpm SATA III 6 Gb/s 3.5" Internal HDD (OEM)
- 16TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 512MB Cache
Toshiba 22TB N300 PRO 7200 rpm SATA III 3.5" Internal NAS HDD
- 22TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 1GB Cache
Toshiba 10TB N300 7200 rpm SATA III 3.5" Internal NAS HDD (2-Pack)
- 10TB Storage Capacity per Drive
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 512MB Cache
Toshiba 20TB MG10 Series 7200 rpm SATA III 3.5" Internal Hard Drive
- 20TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 256MB Cache
Toshiba 22TB X300 Pro Performance 3.5" CMR Internal HDD
- 22TB Capacity
- 3.5" Form Factor
- 7,200 rpm Rotational Speed
- 512MB Cache
SanDisk 2TB Optimus GX PRO 850X NVMe PCIe 4.0 M.2 Internal SSD
- 2TB Storage Capacity
- M.2 2280 Form Factor
- PCIe 4.0 x4 / NVMe 1.4 Interface
- Sequential Reads up to 7300 MB/s
Silicon Power 4TB Endura ED90 NVMe PCIe 4.0 M.2 Internal NAS SSD
- 4TB Storage Capacity
- M.2 2280 Form Factor
- PCIe 4.0 x4 Interface
- Sequential Read Speeds up to 5000 MB/s
WD 22TB Purple Pro 7200 rpm SATA III 3.5" Internal Surveillance Hard Drive (Retail)
- 22TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 512MB Cache
Learning About Internal Hard Drives
Every computer needs an internal hard drive to run, whether it's a desktop at the office or a laptop used for gaming. The one you need and how it works both depend on the type of computer, as well as your intended usage. Choosing a new hard drive, or adding the right one to your custom-built machine, can be a significant upgrade.
What's the Difference Between an Internal and an External Hard Disk?
Essential computer components, internal hard disks feature the boot files needed for the operating system to load. They also require more steps to install than an external hard drive, which usually connects simply via USB. An internal hard drive stores data just like an external one does, but it can also be configured in various ways to create separate spaces for different files. External hard drives can also be placed in enclosures when running back-ups.
What's an Internal Hard Drive Cache?
One feature you may see listed on an internal hard disk is the disk cache. This piece of dedicated RAM boosts the disk's performance and allows data to load quicker.
What's an Internal Solid State Drive?
Most hard drives that store data on physical discs have several moving components such as disc platters and read/write heads. By contrast, internal solid state drives have no moving parts and operate using electrical signals that move across circuits. This causes less vibration and wear on the drive, making it last longer, and keeps your data with greater integrity.
What's a SATA Internal Hard Drive?
SATA, or serial ATA, is a common interface type that many hard drives use. It allows for rapid file transfer, and is the new standard for most computers.
How Do You Install an Internal Hard Drive (HDD)?
Many internal hard drives are relatively simple to install by simply sliding them into place in the drive bay. It's always possible to upgrade or repair a computer by removing its existing or factory-installed drive, replacing it with a new one. PC towers usually need to have the side removed to access the drive, while laptops will often have a bottom panel held in place with screws. Make sure the bay is large enough to accommodate the drive, which will be either a 2.5-inch or a 3.5-inch internal hard drive. Also, remember to take care when handling a hard drive, as static electricity and magnets can potentially harm data. For a hard drive enclosure, simply insert the drive into the slot.
Choosing an Internal Hard Drive
Hard drives often have hundreds of gigabytes or even terabytes of storage space. Choose one with sufficient storage for your needs, as movie and other media files take up quite a lot of space. In addition, look at the read/write speed to know how efficient you can expect performance to be.
B&H Photo and Video has a wide selection of hard drives so you can get the performance you desire.

