Sales & Support(224) 955-1644 Sign In

Skip to content

Still have questions?

Our team is here to help. Reach out anytime for personalized support and solutions tailored to your needs.

A5 IT

At A5 IT, we simplify technology for businesses. From consultation to deployment, we provide end-to-end solutions with transparency, efficiency, and expertise.

[email protected]

1530 E Dundee Rd STE 333, Palatine, IL 60074

Company

Resources

Company Policies

Stay Updated

Subscribe to our newsletter for the latest IT insights and updates.

ISO 9001 ISO 14001 ISO 45001 TAA/889 Certified

D-U-N-S® 093127816

© 2026 A5 IT. All rights reserved.

Shop — Enterprise Hdds

Brand: BuffaloCategory: Enterprise HDDs

Best Match

Filters

Axiom Memory221Western Digital150Seagate96HPE89ACCORTEC INCORPORATED62Micron62

In Stock32

$

to

$

2 TB53 TB54 TB58 TB46 TB3

SATA25SATA 3 Gb/s5SATA 6 Gb/s3SAS1

3.5 in28Hard Drive1

33 products

Buffalo OP-HD12.0H2U-5Y 12 TB Enterprise HDD | Spare Drive, NAS

Buffalo OP-HD12.0H2U-5Y 12 TB Enterprise HDD | Spare Drive, NAS

Buffalo · MPN: OP-HD12.0H2U-5Y

In StockFree 2-DaySave 18%

12 TB storage capacity
Enterprise hard drive replacement part
Designed for Buffalo Terastation 51210RH compatibility
Internal drive form factor

$847.67$1,038.99Business pricing available

Buffalo OP-HD3.0QH 3 TB SATA Replacement HDD | Enterprise NAS

Buffalo OP-HD3.0QH 3 TB SATA Replacement HDD | Enterprise NAS

Buffalo · MPN: OP-HD3.0QH

In StockFree 2-DaySave 5%

3 TB storage capacity
SATA/300 interface standard
Internal hard drive design
Buffalo OP-HD3.0QH MPN

$209.99$219.99Business pricing available

Buffalo OP-HD4.0BST-3Y 4 TB Replacement HDD | TeraStation, Enterprise

Buffalo OP-HD4.0BST-3Y 4 TB Replacement HDD | TeraStation, Enterprise

Buffalo · MPN: OP-HD4.0BST-3Y

In StockFree 2-DaySave 8%

4 TB replacement hard drive
Compatible with select Buffalo TeraStation and LinkStation families
Designed for 1200D and 1400D TeraStation models
Designed for 220D and 420D LinkStation models

$229.99$249.99Business pricing available

Buffalo OP-HD2.0BST-3Y 2 TB Replacement HDD | TeraStation, Enterprise

Buffalo OP-HD2.0BST-3Y 2 TB Replacement HDD | TeraStation, Enterprise

Buffalo · MPN: OP-HD2.0BST-3Y

In StockFree 2-DaySave 7%

2 TB replacement hard drive
Designed for Buffalo TeraStation 1200D and 1400D families
Compatible with LinkStation 220D and 420D families
Internal hard drive form factor

$130.31$139.99Business pricing available

Buffalo OP-HD2.0QH 2 TB Replacement HDD | DriveStation Quad, SATA

Buffalo OP-HD2.0QH 2 TB Replacement HDD | DriveStation Quad, SATA

Buffalo · MPN: OP-HD2.0QH

In StockFree 2-DaySave 5%

2 TB storage capacity
Internal hard drive design
SATA drive interface
Replacement HDD for DriveStation Quad

$179.99$189.99Business pricing available

Buffalo OP-HD4.0WH 4 TB Replacement HDD | DriveStation, SATA, Enterprise

Buffalo OP-HD4.0WH 4 TB Replacement HDD | DriveStation, SATA, Enterprise

Buffalo · MPN: OP-HD4.0WH

In StockFree 2-DaySave 6%

4 TB replacement hard drive
Designed for Buffalo DriveStation Duo Gen2 storage systems
Compatible with HD-WHTU3R1 series
SATA drive interface

$299.99$319.99Business pricing available

Buffalo OP-HD1.0BST-3Y 1 TB Replacement HDD | TeraStation

Buffalo OP-HD1.0BST-3Y 1 TB Replacement HDD | TeraStation

Buffalo · MPN: OP-HD1.0BST-3Y

In StockFree 2-DaySave 9%

1 TB native capacity
Replacement HDD for Buffalo storage systems
Buffalo MPN OP-HD1.0BST-3Y
Intended for TeraStation 1200D and 1400D families

$99.99$109.99Business pricing available

Buffalo OP-HD3.0BST-3Y 3 TB Replacement HDD | TeraStation, Enterprise

Buffalo OP-HD3.0BST-3Y 3 TB Replacement HDD | TeraStation, Enterprise

Buffalo · MPN: OP-HD3.0BST-3Y

In StockFree 2-DaySave 6%

3 TB storage capacity
Internal hard drive form factor
SATA drive interface
Compatible with select Buffalo TeraStation and LinkStation families

$149.99$159.99Business pricing available

Buffalo OP-HD8.0H2U-5Y 8 TB Enterprise HDD | TeraStation 51210RH

Buffalo OP-HD8.0H2U-5Y 8 TB Enterprise HDD | TeraStation 51210RH

Buffalo · MPN: OP-HD8.0H2U-5Y

In StockFree 2-DaySave 6%

8 TB storage capacity
Enterprise hard drive replacement spare
Buffalo OP-HD8.0H2U-5Y MPN
Compatible with TeraStation 51210RH

$581.65$619.99Business pricing available

Buffalo OP-HD2.0WH 2 TB 3.5" SATA Hard Drive | Replacement Storage

Buffalo OP-HD2.0WH 2 TB 3.5" SATA Hard Drive | Replacement Storage

Buffalo · MPN: OP-HD2.0WH

In StockFree 2-DaySave 5%

2 TB storage capacity
3.5-inch internal hard drive
SATA interface
Designed for Buffalo DriveStation Duo storage systems

$179.99$189.99Business pricing available

Buffalo OP-HD6.0QH 6 TB Replacement Drive | Enterprise HDD, NAS

Buffalo OP-HD6.0QH 6 TB Replacement Drive | Enterprise HDD, NAS

Buffalo · MPN: OP-HD6.0QH

In StockFree 2-Day

6 TB storage capacity
Buffalo replacement drive for DriveStation Quad
Enterprise HDD class replacement media
Internal hard drive design

$499.99$519.99Business pricing available

Buffalo OP-HD4.0N 4TB Replacement Spare NAS HD | TeraStation Enterprise

Buffalo OP-HD4.0N 4TB Replacement Spare NAS HD | TeraStation Enterprise

Buffalo · MPN: OP-HD4.0N

In StockFree 2-DaySave 7%

4 TB storage capacity
Buffalo OP-HD4.0N part number
Replacement spare for TeraStation 3010, 3020, 5010, and 6000
Enterprise NAS hard drive class

$158.64$169.99Business pricing available

Buffalo OP-HD8.0N 8 TB NAS HDD Replacement Spare | Enterprise Storage

Buffalo OP-HD8.0N 8 TB NAS HDD Replacement Spare | Enterprise Storage

Buffalo · MPN: OP-HD8.0N

In StockFree 2-DaySave 17%

8 TB storage capacity
Buffalo OP-HD8.0N part number
Replacement spare for TeraStation NAS
Designed for supported Buffalo storage systems

$254.75$306.99Business pricing available

Buffalo OP-HD16.0H2U-5Y 16 TB Enterprise HDD | TeraStation, Spare

Buffalo OP-HD16.0H2U-5Y 16 TB Enterprise HDD | TeraStation, Spare

Buffalo · MPN: OP-HD16.0H2U-5Y

In StockFree 2-DaySave 19%

16 TB storage capacity
Buffalo OP-HD16.0H2U-5Y MPN
Compatible with TS51210RH6404 and TS51210RH19212
Enterprise hard drive replacement

$1,051.90$1,298.73Business pricing available

Buffalo OP-HD2.0N 2TB Replacement Spare NAS HD | TeraStation Enterprise

Buffalo OP-HD2.0N 2TB Replacement Spare NAS HD | TeraStation Enterprise

Buffalo · MPN: OP-HD2.0N

In StockFree 2-DaySave 8%

2 TB storage capacity
Buffalo OP-HD2.0N part number
Replacement spare for TeraStation 3010 and 5010
Enterprise NAS hard drive class

$138.24$149.99Business pricing available

Buffalo OP-HD3.0N 3 TB NAS HDD Replacement Spare | Enterprise Storage

Buffalo OP-HD3.0N 3 TB NAS HDD Replacement Spare | Enterprise Storage

Buffalo · MPN: OP-HD3.0N

In StockFree 2-DaySave 7%

3 TB storage capacity
Buffalo MPN OP-HD3.0N
NAS replacement spare drive
Designed for Terastation systems

$148.44$159.99Business pricing available

Buffalo OP-HD16.0N 16 TB NAS HDD Replacement Spare | Enterprise Storage

Buffalo OP-HD16.0N 16 TB NAS HDD Replacement Spare | Enterprise Storage

Buffalo · MPN: OP-HD16.0N

In StockFree 2-DaySave 37%

16 TB storage capacity
Buffalo MPN OP-HD16.0N
NAS replacement spare drive
Designed for Terastation systems

$635.75$1,007.99Business pricing available

Buffalo OP-HD20.0H2U-5Y 20 TB Enterprise HDD | TeraStation

Buffalo OP-HD20.0H2U-5Y 20 TB Enterprise HDD | TeraStation

Buffalo · MPN: OP-HD20.0H2U-5Y

In StockFree 2-DaySave 5%

20 TB native capacity
Enterprise HDD replacement for TeraStation systems
Buffalo MPN OP-HD20.0H2U-5Y
Designed for supported TeraStation chassis

$1,336.14$1,399.99Business pricing available

Buffalo OP-HD4.0H2U-5Y 4 TB Enterprise HDD | Terastation Spare

Buffalo OP-HD4.0H2U-5Y 4 TB Enterprise HDD | Terastation Spare

Buffalo · MPN: OP-HD4.0H2U-5Y

In StockFree 2-DaySave 12%

4 TB storage capacity
Buffalo manufacturer part number OP-HD4.0H2U-5Y
Enterprise hard drive replacement for Terastation 51210RH
Spare replacement configuration

$318.41$359.99Business pricing available

Buffalo OP-HD12.0N 12 TB NAS Spare HDD | TeraStation Enterprise

Buffalo OP-HD12.0N 12 TB NAS Spare HDD | TeraStation Enterprise

Buffalo · MPN: OP-HD12.0N

In StockFree 2-DaySave 23%

12 TB storage capacity
Replacement spare for Buffalo TeraStation NAS
Supported by TeraStation 5410, 5810, and 6400 families
Internal hard drive design

$535.43$695.99Business pricing available

Buffalo OP-HD10.0H2U-5Y 10 TB Enterprise HDD | Terastation Spare

Buffalo OP-HD10.0H2U-5Y 10 TB Enterprise HDD | Terastation Spare

Buffalo · MPN: OP-HD10.0H2U-5Y

In StockFree 2-Day

10 TB storage capacity
Buffalo manufacturer part number OP-HD10.0H2U-5Y
Enterprise hard drive replacement for Terastation 51210RH
Spare replacement configuration

$740.58$749.99Business pricing available

Buffalo OP-HD6.0N 6 TB NAS HDD Replacement Spare | Enterprise Storage

Buffalo OP-HD6.0N 6 TB NAS HDD Replacement Spare | Enterprise Storage

Buffalo · MPN: OP-HD6.0N

In StockFree 2-Day0

6 TB storage capacity
Buffalo OP-HD6.0N part number
Replacement spare drive for TeraStation NAS
Compatible with TeraStation 3010 and 5010 series

$318.41$319.99Business pricing available

Buffalo OP-HD10.0N 10 TB NAS HDD Replacement | TeraStation Enterprise

Buffalo OP-HD10.0N 10 TB NAS HDD Replacement | TeraStation Enterprise

Buffalo · MPN: OP-HD10.0N

In StockFree 2-DaySave 22%

10 TB storage capacity
NAS hard drive replacement spare
Buffalo OP-HD10.0N MPN
Compatible with TeraStation 3010, 5010, WS5020, and 6400 models

$404.52$519.99Business pricing available

Buffalo OP-HD20.0N 20 TB NAS HDD | Enterprise Replacement Drive

Buffalo OP-HD20.0N 20 TB NAS HDD | Enterprise Replacement Drive

Buffalo · MPN: OP-HD20.0N

In StockFree 2-DaySave 39%

20 TB storage capacity
Replacement NAS hard drive
Compatible with TeraStation 3010, 3020, 5010, and 6400 models
Designed for Buffalo NAS environments

$763.13$1,247.99Business pricing available

12