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Western Digital My Cloud EX4 Personal Cloud Storage System

Important Specifications

Western Digital

Specifications are important but they do not tell the whole story. Also, specifications when taken out of context can definitely lead to making false assumptions about a product. We list the EX4’s specifications here only because we will reference them later. The My Cloud EX4 is currently available at select U.S. retailers and online at the MSRP is $379.99 USD for the drive-less My Cloud EX4, $799.99 USD for 8 TB, $949.99 USD for 12 TB and $1,149.99 USD for 16 TB. Take a quick glance and lets move on.

Interface10/100/1000 MB/s compatible
Gigabit Ethernet
DimensionsHeight: 8.21 in (208.6 mm)
Length: 8.67 in (220.2 mm)
Width:  6.30 in (160.1 mm)
Weight:7.2 lbs (3.3 kg) 0 TB
12.8 lbs (5.8 kg) 8 TB
12.8 lbs (5.8 kg) 12 TB
13.8 lbs (6.2 kg) 16 TB
System RequirementsWindows® 8, Windows 7,
Windows Vista® or Windows XP
(SP 3) operating systems;
Mac OS® X Mountain Lion,™ Lion™ or
Snow Leopard® operating systems
DLNA/UPnP devices for streaming
Internet connection for remote access
Capacities and models0 TB  WDBWWD0000NBK
Kit ContentsFour-bay personal cloud storage
Ethernet cable
Power supply and cable
Quick Install Guide
Operating SpecificationsOperating temperature: 5°C to 35°C
Non-op. temperature: -40° C to 70° C
1A USB 3.0 host and USB 3.0 certified cable are required to
obtain USB 3.0 performance.
SUPPORTED BROWSERSInternet Explorer® 8 or higher,
Safari® 6 or higher, Firefox® 21
or higher, Google Chrome™ 27
and later on supported Windows
and Mac OS platforms
Compatibility may vary depending on user’s hardware
configuration and operating systems.
Limited Warranty2 years Worldwide

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5 Comments... What's your say?

  1. Hi Jason
    Thanks for the great review of the WD MyCloud EX4. I had a similar type of system I purchased years ago called the LaCie 5Big. It had 5, 1.5TB hot swappable drives with auto backup, Raid, etc,. It worked great for years until it experienced it’s first power failure during a local storm. Upon power up it went through a rebuild mode which ended up corrupting all the data. After a very expensive data recovery I reloaded the unit, ran the system again and tested a simulated power outage. Same result. LaCie tech support had no solution other than to suggest a UPS and to do a controlled power down in the event of an outage. I did have a UPS connected but once it runs out in the middle of the night, unmanned, the resulting failure scenario remains.
    I know you did a network failure test but did you happen to do a simulated power outage test on the WD EX4?


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