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Save all your valuable photos, videos, music and files on this ready-to-go, high-performance NAS solution for secure access to them anytime, from anywhere. Protect your content with multiple backup options, customize your NAS with a full suite of apps and enjoy peace of mind knowing that we've put our best in it, so you can put your best on it.

Centralize your media and content in one safe, organized place

Whether you're a creative hobbyist, creative professional or have an impressive media collection, you will undoubtedly have loads of digital content to store. With My Cloud Expert Series NAS, you can easily centralize and protect your valuable content from all the PC and Mac computers on your network. Plus, access it anytime, from anywhere with tablets and smartphones.

Get power that keeps up with your passion

Powered by a strong Marvell® ARMADA® 388 1.6 GHz dual-core processor, My Cloud EX4100 gives you ultra-fast transfer speeds of 116 MB/s upload and 116 MB/s download to keep up with your high-performance needs. Now you can upload more content simultaneously, stream your HD media more smoothly, and enjoy your creative life with ease.

Gigabit Ethernet Testing environment based on Dell Optiplex 9020 (SFF) with Intel Core i7, 8GB RAM running Windows 8.1 Pro using an Intel X540-T2 10G Ethernet connection. Performance may vary based on different hardware / software configurations as well as network load during testing.

Stream like a pro

With the built-in Twonky DLNA-certified media server, you can seamlessly stream all your HD videos, photos and music stored on your My Cloud Expert Series NAS to media players, Smart TVs, gaming consoles and other DLNA-certified devices on your network. Or, use the Plex media server third-party app to organize your media collections and stream them to all of your screens.

Safeguard your content with comprehensive data protection

My Cloud EX4100 keeps your irreplaceable photos, videos and files safe with multiple data protection options to secure your content from unexpected loss. Protect all the PC and Mac computers on your network using local, remote or cloud backup. Multiple RAID configurations and volume encryption add even more protection and security for all your files.

Be up and running in minutes

My Cloud EX4100 comes preconfigured to get you set up and on your way without any hassle. The intuitive dashboard guides you through the process of setting up users and shares, customizing system features and monitoring your storage. And with a toolless and trayless drive bay design, drive installation and hot swap is effortless.

Built-in reliability for added peace of mind

My Cloud Expert Series pre-configured NAS come populated with WD Red NAS hard drives. Ultra-reliable and purposely built for NAS systems, WD Red drives improve performance and thrive in 24x7 environments.

WD's exclusive NASware™ technology further optimizes WD Red for the NAS environment. From vibration compensation, optimized power usage and protecting your content in the event of a power loss or disruption, the firmware is designed to give you improved reliability and system performance.

Keep an eye on your home, wherever you're at

Equipped with award-winning Milestone ARCUS Surveillance software, delivering a powerful surveillance system to keep watch on what matters to you most.

Key features:

  • Supports up to 12 cameras
  • Unlimited camera licenses.
  • No added cost.
  • Automatic camera detection with more than 3,700 cameras
  • Easy to install and manage Free mobile app to view live and recorded video anywhere

Get enhanced media streaming and network redundancy

Dual Gigabit Ethernet ports for link aggregation enhances network performance giving you the best possible HD media streaming experience. It also provides for network redundancy should one of your network connections fail.

A power supply with a backup plan

My Cloud OS - content management made simple

WD's My Cloud OS delivers a suite of tools and apps that empower you to easily take control of the content that matters to you most. The intuitive, easy-to-use dashboard makes set up, managing storage and personalizing your NAS effortless. Our award-winning My Cloud app allows you to securely access and share your files from anywhere with computers, tablets and smartphones. And with popular third-party apps available for download, you are enabled to customize your NAS to best fit your needs.

Automatically copy your external USB with the touch of a button

With the built-in, one-touch copy button conveniently located on the front of the NAS, you can automatically copy all the photos, videos and music you have stored on an external USB or camera to the My Cloud EX4100, keeping all your media and files in one safe, central location.

Save on energy automatically

My Cloud EX4100 comes equipped with drive sleep mode, LCD and LED on/off and power scheduling capabilities to save power and runtime energy.

Professional-grade features

  • iSCSI target and initiator
  • Integrated FTP and WebDAV server
  • Integrated SSH Secure Shell
  • Link aggregation and network redundancy
  • Dual power ports for failover support
  • Jumbo frame support
  • IPv4 and IPv6
  • UPS support (USB and network)
  • Real-time resource monitor
  • SNMP
  • Microsoft Active Directory support
  • Energy-saving options



Gigabit Ethernet x 2

Power supply (DC in) x 2

USB 3.0 expansion port x 2 rear

USB 3.0 port with direct copy x 1 front

Drive bays

4 x 3.5 inch hard drive bays, hot swap capable, tray-less design

Internal hard drives

WD Red NAS hard drives


Marvell ARMADA 388 1.6 GHz dual-core



System Requirements

Windows 8, Windows 7, Windows Vista, Windows XP (SP3) operating system

Mac OS X Mountain Lion, Lion, Snow Leopard and Mavericks operating systems

DLNA/UPnP devices for streaming

Internet connection for remote access

Supported Web Browsers

Internet Explorer 8 or higher

Safari 6 or higher

Firefox 21 or higher

Google Chrome 27 and later on supported Windows and Mac OS platforms

Network Protocols

DHCP Client or Static IP

NTP Client

Dynamic DNS (DDNS)

Apple Bonjour and Windows Rally

Jumbo frame support up to 9K

VLAN (802.1Q)

Link Aggregation(802.1ad)/ Ethernet teaming and failover for 2 Gigabit Ethernet ports

UPnP port forwarding




Network File Services

OS Supports

Windows XP Home/ Pro/ 64-bit SP3+

Windows Vista/ 7/ 8 (All versions)

Mac OS X 10.6, Lion, Mountain Lion

CIFS/SMB for Windows, Mac OS X and Linux

NFSv3 for Linux and UNIX

AFP for Mac OS X

Microsoft Distributed File System (DFS)

WebDAV Server


Active Directory support for Windows Server

Volume Encryption (256 bit AES)

File System

EXT4 for internal HDD

Support following formats for externally attached USB drives


NTFS (read and write capability)

HFS+J (case sensitive)

Linux EXT2, EXT3, EXT4

FTP Server

Support Port Setting

Set port range of passive FTP

Option to report external IP in PASV mode

Client language selection

Anonymous FTP

Secure FTP Support

Support File eXchange Protocol (FXP)

FTP bandwidth restriction (upstream/downstream)

IP address block (block access from undesired IP address)

Download Management

HTTP downloads from a URL to a user specified folder on the NAS

FTP downloads of files or folders from an FTP server to another files/folders on the NAS

P2P Download Manager

Disk management

RAID: JBOD, spanning, 0/1/5 10/5 + hot spare support

RAID migration



RAID 1 to RAID 5

Hot swapping

Hot spare (in four disk mode)

Disk roaming

Array roaming

Power Management

Drive Spin Up/Down (including Attached WD USB drives)

Automatic power recovery (with UPS)

Schedule power on/off

Graceful shutdown on UPS low battery

FAN Control

Network UPS

Wake On LAN

Remote Access

My Cloud and WD Photos mobile app

My Cloud desktop app

User/Group Management

Max No. of Users: 512 for Samba, 800 for ADS

Max No. of User Groups: 64 for Samba, 200 for ADS

Max No. of Network Shares: Max No. of Network Shares: 128

Max concurrent CIFS connections: 10

User/Group assignment for network sharing/FTP

Quotas for groups or users

Assignment of users to multiple groups

Batch assignment of users to groups

Batch user creation

Importing users (CSV Delimited Format)

Importing groups (CSV Delimited Format)

LCD Panel

2 lines of 16 characters for status and alerts

Backup management

Remote backups: My Cloud Expert Series to My Cloud Expert Series locally or remotely

Apple Time Machine (10.5.8+) support

Backup internal files or folders of the device to other files/folders on the NAS

Cloud-based backup services

Amazon S3

ElephantDrive (https://home.elephantdrive.com/)

Disk sync management for the attached USB ports

System Management

LCD display information:

IP Address of connected server (and friendly name)

Fan monitor

System temperature monitor

Disk monitor

Disk volume monitor

Ethernet plug monitor

Device uptime

Capacity remaining

Firmware version

System status: Device Information

Capacity usage status for the external storage

File category breakdown of how much video, photo, music is stored

Alert notifications

Event UI message

UI Alert (with message acknowledgment required)

Email notice

QuickView pop-up message

RED LED status

Network recycle

Support Windows CIFS

Support Apple AFP

System/FTP Log (Syslog Client)

HTTP/S (Web) Administration Interface (HTTP Server)

Firmware upgrade

Configuration backup and restore


System Information

CPU percentage

RAM usage

Network performance in MB/s

USB port

Support UPS monitoring

Support External Storage device

Support MTP (Media Transfer Protocol) and PTP (Picture Transfer Protocol)

Media Streaming

UPnP AV Media server (Twonky)

DLNA certification

Support WD TV Live, Xbox 360, PlayStation 3, Windows 8, connected TVs, Blu-ray players and digital picture frames

iTunes Server

Add-on support

aMule - peer to peer file sharing application

Icecast - media streaming app

phpBB - Internet forum application

Joomla! - content management system

SqueezeCenter - streaming audio server

phpMyAdmin - My SQL administration tool

WordPress - blogging tool and content management system

Transmission - BitTorrent client


iSCSI Target

CHAP authentication

iSNS (Internet Storage Name Service )

Up to 64 iSCSI Targets

Volume Virtualization: NAS can be configured as an iSCSI initiator and capable of mapping any iSCSI target of the other device to be one virtual volume.

Virtual Disk Drive (via iSCSI Initiator)

Max number of virtual disk drives supported is eight (8)

Power Supply

Input voltage: 100V to 240V AC

Input frequency: 50 to 60 Hz

Output voltage: 19V DC, up to 6.32A


Operating Temperature: 0 C to 35 C ( 32 F to 95 F)

Non-op Temperature: -40 C to 70 C (-40 F to 158 F)

Package Contents


Ethernet cable

Power supply and cable

Quick Install Guide

No additional files, specification sheets, guides or documentation found for product.


You can finance this product via Flexirent! For more information regarding flexirent, and to use the flexirent finance calculator, please click here.

The calculator provides an indicative rental cost only. Flexirent prices quoted include GST and stamp duty. Subject to credit approval. To obtain full quote and pre-approval please contact Flexirent Customer Service on 1800 240 102. Rental is payable monthly.

Warranty: 3 year return to base

Full manufacturers warranty details are available at the manufacturers (Western Digital) web site.

Unless otherwise specified Techbuy is normally your first point of contact for warranty related returns, further information regarding our warranty policies and consumer guarantees is available on our policies and service & support pages.

To apply for return of a product just go to our returns page.

These terms are in addition to and do not affect any terms, conditions, guarantees and warranties implied by law.

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