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747464133386
Buffalo OP-HD4.0H2U-5Y 4TB 7200RPM SATA 6Gb/s 3.5-Inch Internal Hard Drive
747464133386

Buffalo OP-HD4.0H2U-5Y 4TB 7200RPM SATA 6Gb/s 3.5-Inch Internal Hard Drive

Best price now

$299.99at AmazonChecked 3 h ago

Compared across 2 stores. Prices are checked against each store and labelled with when. As an Amazon Associate, Deal.ai earns from qualifying purchases.

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Price facts

  • Lowest price today: $299.99 at Amazon (checked Nov 11, 2026).
  • Checked at 2 stores.

Our take on the Buffalo OP-HD4.0H2U-5Y 4TB 7200RPM SATA 6Gb/s 3.5-Inch Internal Hard Drive

The Buffalo OP-HD4.0H2U-5Y is a 4TB 7200 RPM SATA 6Gb/s 3.5-inch internal hard drive sold as a replacement or expansion drive for Buffalo's TeraStation and LinkStation NAS units. It is a conventional spinning drive, not a purpose-built NAS disk, so it trades the vibration and workload ratings of drives like WD Red or Seagate IronWolf for straightforward capacity. Buyers should confirm their Buffalo model's compatibility list first, because the OP- part number is tied to specific chassis. For anyone matching an existing Buffalo array, it is the safe drop-in choice; for a new build, a dedicated NAS drive is the better pick.

Best forReplacing a failed drive in a Buffalo TeraStation or LinkStationAdding capacity to a compatible Buffalo NASDesktop PC storage where 4TB and 7200 RPM are enoughBuyers who want a drive matched to an existing Buffalo array
Pros
  • 4TB capacity on a single 3.5-inch drive
  • 7200 RPM spindle for faster sequential reads and writes than 5400 RPM drives
  • Standard SATA 6Gb/s interface works with most NAS and desktop bays
  • Sold as a Buffalo OP- part, so it matches listed TeraStation and LinkStation models
  • Straightforward install in a compatible tray or caddy
Cons
  • Not a NAS-rated drive: no published workload or vibration spec like WD Red or IronWolf
  • 7200 RPM means more noise and heat than low-RPM NAS drives
  • Compatibility is limited to Buffalo models that list this OP- part number
  • No bundled cables, screws or mounting hardware
  • Spinning drives are slower than SSDs for random access

Buffalo OP-HD4.0H2U-5Y 4TB 7200RPM SATA 6Gb/s 3.5-Inch Internal Hard Drive prices at every store

  • GotodirectNew

    In stock

    $315.56Checked 3 h ago
    Visit Gotodirect
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $299.99Free shippingChecked 3 h ago
    Visit Amazon

Store links may earn us a commission.

Buffalo OP-HD4.0H2U-5Y 4TB 7200RPM SATA 6Gb/s 3.5-Inch Internal Hard Drive price history

Lowest price we've seen: $299.99 on Nov 11 at Amazon. Tracked across 1 store since Nov 11.

About the Buffalo OP-HD4.0H2U-5Y 4TB 7200RPM SATA 6Gb/s 3.5-Inch Internal Hard Drive

This is a 4TB internal hard drive in the 3.5-inch size. It spins at 7200RPM and connects over SATA 6Gb/s.

Capacity
4TB
Speed
7200RPM
Interface
SATA 6Gb/s
Form factor
3.5-inch
Type
Internal hard drive
Model
OP-HD4.0H2U-5Y

Questions and answers

Will this drive work in my TeraStation or LinkStation?
Only if your model's compatibility list names the OP-HD4.0H2U-5Y. Buffalo ties OP- part numbers to specific chassis, so check the list before buying.
Is this a NAS drive?
No. It is a standard 7200 RPM desktop-class drive. It works in a compatible Buffalo NAS, but it lacks the workload and vibration ratings of drives sold as NAS-specific.
Can I use it in a regular desktop PC?
Yes. It is a standard 3.5-inch SATA 6Gb/s drive, so any desktop with a free SATA port and bay can use it.
Is it louder than a 5400 RPM drive?
Generally yes. A 7200 RPM spindle spins faster and typically produces more noise and heat than a low-RPM drive.
What comes in the box?
The drive itself. Expect to reuse your existing tray, caddy and screws; cables and mounting hardware are not typically included.
Should I buy this or a WD Red or Seagate IronWolf?
Buy this to match an existing Buffalo array. For a new NAS or a RAID build, a NAS-rated drive is the better fit.
Where is the Buffalo OP-HD4.0H2U-5Y 4TB 7200RPM SATA 6Gb/s 3.5-Inch Internal Hard Drive cheapest?
At Amazon, for $299.99, as of our latest check.
Where can I buy the Buffalo OP-HD4.0H2U-5Y 4TB 7200RPM SATA 6Gb/s 3.5-Inch Internal Hard Drive?
2 stores we checked sell it, including Gotodirect, Amazon.