Review Index:

Western Digital My Cloud Mirror - Consumer Mirrored Cloud Storage

Subject: Storage
Manufacturer: Western Digital

Performance, Conclusion, Pricing, and Final Thoughts


With the My Cloud Mirror directly connected to our testbed (static IP) to minimize network traffic interference, we performed some large file copies to and from the Mirror:


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The My Cloud, combined with Windows 8.1, uses a very high throughput version of SMB, and therefore achieves high throughputs seen above. I flipped the network configuration over to enable jumbo frames to see if we could squeeze any more throughput out of it:


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Jumbo frames can help squeeze just a little bit more throughput from the Mirror, but remember, every link in your network chain (switches, routers, etc) must support jumbo frames in order for it to work. Otherwise it the link will default back to standard MTU sizes.

We did some throughput tests with connected USB devices on our My Cloud EX2 coverage. Check there for more detail, along with a note about possible exFAT device compatibility issues.



  • Compact, efficient, silent design
  • Excellent network throughput
  • Great out of the box / setup experience
  • Lower cost than My Cloud EX2


  • Reduced feature set as compared to the My Cloud EX2
  • exFAT not supported on USB devices


These prices run ~$20 cheaper than the equivalent model of the EX2. Additionally, the EX2 is available in a diskless model, while the Mirror is only available with drives pre-installed.

Final Thoughts:

The Western Digital My Cloud Mirror rounds out WD's My Cloud suite of devices nicely. It keeps the same stellar performance of the EX line devices, as well as carrying down many of the features and apps present on the EX2. RAID adds much needed redundancy to the My Cloud line, and Western Digital's My Cloud suite lets you get to that redundantly stored data from just about anywhere - even away from home. Cloud-based backup options are available, as well as backup to locally connected devices or even other My Cloud devices on the same network. Transfer speeds were similar to the EX2, with ~70MB/sec writes and reads exceeding 100MB/sec over local gigabit Ethernet. If you've been eyeing the My Cloud EX2, but had no need for the added enterprise features of that device, the My Cloud Mirror will get you everything else and even save you a few bucks in the process.

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Video News

July 10, 2014 | 01:35 AM - Posted by Tim Verry

Hmm, this or a Synology NAS?

September 8, 2015 | 07:03 PM - Posted by OctaveanActually (not verified)


Either this, Synology or build your own NAS,..... :)

I have a WD MyCloud EX2 and I run a Windows Server 2012 Essentials box as well as running a Synology DSM device. IMO, for ease of use, features and OS I would definitely recommend the Synology.

July 10, 2014 | 08:21 PM - Posted by fade2blac

Any SSH access? Also, it might help to spell out what jumbo frame sizes are supported (4k, 9k, 10k, etc.) Unfortunately, not all jumbo frames are equal because its something of an unofficial/loose standard. It sucks to troubleshoot network issues because even though all your devices support "jumbo" frames, one supports up to 9k and two older devices only support up to 4k...and even then finding out that "4k" is not the same actual payload size in bytes across different devices.

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July 19, 2014 | 01:32 PM - Posted by Anonymous (not verified)

Just a buyer beware here. I got a WD router a few years ago that also had a built in HD with access to the WD2go website, which i believe is the same as this My Cloud stuff. As far as I can tell the WD cloud service scans the contents of the drive for copyrighted material and, if it finds any, makes the drive invisible to your account when you aren't accessing it on the LAN. So if you were thinking that this might be a great way to save your mp3s and movies on your own internet accessible hard drive I'd warn you that you may be very disappointed.

I'm not sure that this is still the case with the WD2go service since I gave up on trying to get it to work a couple years ago. I'd be interested to see if anyone has any recent experience with this. I'd love to be wrong and be able to actually utilize that router again.

July 21, 2014 | 08:25 AM - Posted by Sara Sota (not verified)

Hi, I need 4TB external hard drive to set up a personal cloud. Wondering what the differences are between "My Cloud Mirror 4TB" and cloudwedge". would you explained me please?

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