Year-End SaleEnds 1/1/26. Limited quantities. No rainchecks.

Main Content
product image

WD - Red Plus 4TB Internal SATA NAS Hard Drive

Model: WD40EFRX
SKU: 2452034
This item is no longer available in new condition. See similar items below
  • Key Specs
    • Storage Drive Type: HDD (Traditional, mechanical hard disk drives are the most common type of storage because they're relatively inexpensive and offer huge capacities. However, they also generate both noise and heat. Solid state drives, also known as SSDs, are many times faster than hard disk drives and have no moving parts to wear out, but typically offer less capacity for the same price.)
    • Rotational Speed: 5400 revolutions per minute (The rate at which the hard drive spins its platters. The higher the rotational speed, the faster the drive can read and write data.)
    • Interface(s): SATA (Refers to the types of connections that devices use to interact and communicate with each other.)
  • General
    • Product Name: Red Plus 4TB Internal SATA NAS Hard Drive
    • Brand: WD
    • Model Number: WD40EFRX
  • Performance
    • Storage Drive Type: HDD (Traditional, mechanical hard disk drives are the most common type of storage because they're relatively inexpensive and offer huge capacities. However, they also generate both noise and heat. Solid state drives, also known as SSDs, are many times faster than hard disk drives and have no moving parts to wear out, but typically offer less capacity for the same price.)
    • Rotational Speed: 5400 revolutions per minute (The rate at which the hard drive spins its platters. The higher the rotational speed, the faster the drive can read and write data.)
  • Compatibility
    • Internal Or External: Internal
    • Interface(s): SATA (Refers to the types of connections that devices use to interact and communicate with each other.)
    • Minimum System Requirements: PC: Windows 7 or 8; Mac OS
  • Features
    • Security Features: None
    • Data Encryption: false
    • Usage: Network Attached Storage (NAS)
  • Memory
    • Cache Buffer Size: 128 megabytes (The data capacity of the cache buffer (or disk buffer) that acts as temporary memory for the drive. The cache holds the most recently and frequently used data to save the drive the extra step of pulling it from permanent storage every time it's needed, which helps increase the drive's overall speed.)
  • Dimensions
    • Product Height: 1 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
    • Product Width: 4 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
    • Product Weight: 22.9 ounces (The out of box weight of the item.)
  • Included
    • Included Software: NASWare 3.0
  • Other
    • UPC: 718037810058

This WD Red™ Plus 4TB internal hard drive is designed for NAS systems with 1-8 drive bays in both 3.5" form factors. Its 4TB capacity provides plenty of space to house files, and the Serial ATA interface lets you connect your laptop or desktop. Packed with power to handle the small- to medium-sized business NAS environments and increased workloads for SOHO customers, WD Red™ Plus is ideal for archiving and sharing, as well as RAID array rebuilding on systems using ZFS and other file systems. Built and tested for up to 8-bay NAS systems, these drives give you the flexibility, versatility, and confidence in storing and sharing your precious home and work files.

Drives and Storage Buying Guide

  • 4TB capacity: Provides plenty of room for pictures, videos, music, documents and other important files.
  • Serial ATA interface: Makes it easy to connect to your computer. The hard drive is designed for use with NAS systems with 1-8 drive bays in both 3.5" form factors.
  • Data transfer rates up to 150MB/sec.: For quick response when updating files.
  • 5400 rpm speed: Promotes fast performance.
  • Low operating temperatures: Help keep components cool.
  • Compatible with Mac and PC: For flexible installation options.
Whats Included
  • Red Plus 4TB Internal SATA NAS Hard Drive

Q: I have a SANNCE 4CH 1080P HD POE Security System NVR & 4x 2MP Bullet Cameras. Will this record for a 30 day period & will this work for this system?

A: I would check out the Western Digital site. Usually they have information to help you select the best fit and determine the appropriate size for your application. They do make a drive, I think it may be their purple version, that mentions use for camera recording and I believe it is 7200RPM instead of 5400RPM.

Q: What is the type of technology used for writing to the disk? Is this an SMR (shingled magnetic recording) or CMR (conventional magnetic recording) type?

A: Hi Toolman421, Please refer the below link to see the list of our client internal HDDs available through the channel​​​​​​​ https://support-en.wd.com/app/answers/detail/a_id/29458/initiator/user  Need Help? Please see our "'Contact Us" page for information.

Q: I want to purchase a MacBook Pro laptop but I want to build it myself I wanted to know what's the highest internal hard drive I could put in could I go higher than 4 Tb if so how many an also gigabytes wise I would like to upgrade an how many gigs

A: 1. This drive is a 3.5” drive, not a notebook 2.5” spinning or solid state drive. 2. Many Mac’s only come with flash memory, so upgrading in a sense would just mean a build to order upgrade. 4TB would be very expensive for flash memory. 3. If you need exorbitant amounts of storage, the macs can be Booted from an external hard drive and that would give the option of very large hard drives. Much cheaper than Internal flash memory. My Samsung 2TB Ssd cost $ 120. 2tb flash memory in a Mac mini was $1000 extra. Check with Apple for storage limits, but with 64 bit OS ie catalina, storage should not be an issue.

Q: Would this work with my Dell inspiron 3650 i3

A: Yes it would work. It's a standard 3.5" hard drive but it's mainly used for Network Attached Storage (NAS). The speed is only 5400 RPM which is more than sufficient for that type of application but for a desktop I would get a cheaper, faster 7200 rpm drive. Either the WD Blue, Black or Green will do.. It all depends on your budget.

Q: Is this drive with Western Digital's new 3.0 NASware or the old 2.0 NASware

A: It may vary and be somewhat luck of the draw, but mine were all the new drives manufactured very recently. Best Buy has a great return policy if they did send the older drives.