Western Digital WD121KFBX 12TB Desktop Red Pro SATA 256MB Cache

Model Number: DCWD121KFBXCA
Web Code: 13654551

Western Digital WD121KFBX 12TB Desktop Red Pro SATA 256MB Cache


WD Red Pro 12TB NAS Internal Hard Drive - 7200 RPM Class, SATA 6 GB/S, 256 MB Cache, 3.5" - WD121KFBX

Available online only

Delivery times vary by location. Most Marketplace items leave sellers' locations within 2 business days. Allow additional time for shipping.


WD Red Pro 12TB NAS Internal Hard Drive - 7200 RPM Class, SATA 6 GB/S, 256 MB Cache, 3.5" - WD121KFBX


Manufacturer: Western Digital Corporation

Manufacturer Part Number: WD121KFBX

Brand Name: WD

Product Line: Red Pro

Product Model: WD121KFBX

Product Name: Red Pro 12TB NAS Hard Drive

Product Type: Hard Drive

**Technical Information**

Storage Capacity: 12 TB

**Drive Performance**

Spindle Speed (rpm): 7200

Buffer: 256 MB

Endurance (TBW): 300 TB

**Network & Communication**

Wireless LAN: No


Drive Interface: SATA

Drive Interface Standard: SATA/600

**Physical Characteristics**

Drive Type: Internal

Form Factor: 3.5"

Height: 1.03" (26.10 mm)

Width: 4" (101.60 mm)

Depth: 5.79" (147 mm)

Weight (Approximate): 660 g


Device Supported: Storage System

Environmentally Friendly: Yes

Environmental Certification: RoHS


Limited Warranty: 5 Year


Storage Drive Type
Solid State Drive
Internal or External
Other Interface
Form Factor




Dimensions (cm)
6.000 (W) x 4.000 (H) x
Dimensions (in)
2.36 (W) x 1.57 (H) x

There is no manufacturer content to show for this product. Explore the Details & Specs and Customer Reviews sections to learn more.

Rating Breakdown












  • Poor Quality
    Reviewed by James C. - August 7, 2021

    Get something else. Poor quality product. Will cause nothing but problems.

    Review originally posted on Western Digital

Shipping Charges
Free standard shipping may be available on orders over a minimum amount (before taxes, fees, and promo codes). Shipping charges may vary based on item size and your shipping address. Want a shipping charge estimate? Simply add an item to your cart, then access the cart and enter your postal code in the shipping estimate section.
Processing Time
Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.
Shipping Area Restrictions
Shipping is not available in the following areas*:
  • No restrictions in Canada
*Please note: Shipping area restrictions may vary for large items. If an item can't be shipped to your address, we'll let you know during the checkout process.
Best Buy for Business Restocking Fees / Return Eligibility
Category Return Period Un-opened Opened
Air Conditioners, Radar Detectors, Cameras & Camcorders, Computers, Monitors, Printers, Tablets, iPads & eReaders, DJ & Karaoke Equipment, Portable DVD Players, Gaming PCs, Seasonal Holiday Goods 30 Days 0% 10%
Cell Phones 15 Days 0% 10%
Major Appliances, Headphones and Earphones, Baby, Juvenile & Maternity Products, Beauty, Grooming & Personal Products, Child Safety (Gates, Car Seats, etc.), Personal Care, Camera Lenses and Flashes, Drones, Full-Frame Cameras, Photo Film, Blank Media (Digital Memory, Hard Drives, Computer Components, etc.), Portable Storage Media & Hardware, Fitness Equipment & Accessories, Jewelry (excluding Earrings), Bedding & Bath, Cleaning Supplies & Chemicals, Mattresses, Pet Supplies, Batteries, Office Supplies, Office Supply Consumables (Ink, Toner, etc.), Musical Instrument Consumables (Guitar Strings, Microphones, etc.), Wind Instruments (e.g. Harmonicas), Hobby-grade R/C Vehicles, 3D Glasses, CDs, Movies & TV Shows (DVD and Blu-ray), Video Games, Virtual Reality Headsets, Safety Goods 30 Days 0% Not Returnable
Furniture & Decor, Home Office Furniture 30 Days 0% 15%
Books, Magazines, and Copyright Materials, Digital Downloads, Intimate Products, Pre-paid Cards, Services, Deliveries & Installations, Food, Vitamins & Supplements, Earrings 30 Days Not Returnable Not Returnable
All other products 30 Days 0% 10%

All returned products must include original packaging.

Return shipping costs will be paid by the seller for all cases where the product is defective, damaged or incorrect. For other cases (e.g. you changed your mind), you will be responsible for this cost.

To request a return

Please contact the seller directly from your Order details page, and provide the following information:

  • Web ID (8-digit number) & product description
  • Number of items to be returned
  • Date you recieved your product
  • Condition of product
  • Condition of packaging
  • Reason for return

All refunds will be processed within 4 days

Please take special note that your Best Buy for Business order or any other Marketplace orders are NOT applicable for Extended Holiday Return Policy.
Please visit our Return Policy page for complete details on our Return Policy.