WD My Cloud Personal Cloud Server Review

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Measuring performance on a device such as the My Cloud that communicates strictly over an Internet connection is a bit dicey. Because My Cloud operates over a network instead of a local storage interface, we aren’t able to run our normal spate of benchmarks.

However, we want to give you a sense of how My Cloud performs, so we conducted timed file transfer tests and also used versions of ATTO and CrystalDiskMark that can run on mapped network drives.

Timed File Transfers
Sending files over the network

For comparison purposes, we clocked several file transfers of different sizes from an external hard drive to our test PC, and then we repeated the process by moving those same files from the PC to the My Cloud and recorded the time each one took. Thus, we got a sense of how transfer times of local storage via a USB 3.0 interface compared to those of My Cloud from a PC.

As expected, transfers from an external drive to a PC happen at a blistering speed compared to those to My Cloud. Note that as the size of the file transfer increases, the time it takes for the PC-to-My Cloud transfers to finish compared to the local USB 3.0 connection increases by a larger delta. Still, 89 seconds for a large (3.33GB) chunk of files is nothing.

ATTO Disk Benchmark
More information here: http://bit.ly/btuV6w

ATTO is a "quick and dirty" type of disk benchmark that measures transfer speeds across a specific volume length. It measures transfer rates for both reads and writes and graphs them out in an easily interpreted chart. We chose .5kb through 8192kb transfer sizes and a queue depth of 6 over a total max volume length of 256MB. ATTO's workloads are sequential in nature and measure bandwidth, rather than I/O response time, access latency, etc.

My Cloud posted some imbalanced read and write speeds here. With smaller file sizes it delivered slower read/write speeds between 1.9/1.3 MBps and 6.2/6.5 MBps, but once the device got cranking it reached as high as 49 MBps (writes) and 74 MBps (reads). Mostly, though, the test results hovered between 50-70 MBps for reads and 30-37 MBps for writes. For comparison, a decent external hard drive with a USB 3.0 interface would turn in read/write speeds closer to 100-120 MBps.

CrystalDiskMark Benchmarks
Synthetic File Transfer Tests

CrystalDiskMark is a synthetic benchmark that tests both sequential and random small and mid-sized file transfers. It provides a quick look at best and worst case scenarios with regard to drive performance, best case being larger sequential transfers and worse case being small, random transfers.

You won't get the same kind of read and write speeds out of the WD My Cloud, as you would with a locally attached drive, but its performance across the network was acceptable.

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BruceAMcIntyre one year ago

I'm not using WD for this stuff any more. I've had a WD "My World" 1TB unit on my network, but now they tell me that it isn't supported with Win 8 or Win 8.1. Kind of really sucks. So I wonder when THIS one will be out of support.

twonky one year ago

Is anyone concerned about enabling UPnP on their router? (Because this is required to remotely access your My Cloud device, per the following WD knowledge base article: http://wdc.custhelp.com/app/answers/detail/a_id/9916)

The US Department of Homeland Security issued a warning about vulnerabilities in UPnP: http://www.us-cert.gov/ncas/current-activity/2013/01/29/CERT-Releases-UPnP-Security-Advisory.

And network penetration specialists advise disabling UPnP on your firewall router. For example: https://www.grc.com/unpnp/unpnp.htm

MartyYawnick one year ago

Sorry all. The MyCloud didn't work for me. Here's the review I posted on the WD website:

Great idea, but not Mac OS ready yet

Judging from many of the glowing online reviews from "respected" websites, I thought the WD MyCloud would be an excellent, easy to use solution for not only backing up my Mac but for easily accessing my files remotely. Instead, my experience with the device was very different and not good at all.

I'm running a MacBook Pro with OS X Mavericks 10.9 with a 960 GB SSD. I'm using an ASUS router with a wired gigabit Ethernet connection, so my problems can't be blamed on WiFi.

Installation and setup was super quick and easy - as easy as advertised. The MyCloud remote login and access was easy to do, easy to set up and worked well. The MyCloud looks great and is extremely quiet. Files read and write at blazing fast speeds across my network!

I'm giving this device a one-star, poor rating because it fails in a very big way for the main reason I bought it -- backing up my Mac across the network. Despite "Time Machine support," the file system of the MyCloud is not a native Mac OS format and doesn't seamlessly work with Mac OS backups.

In the two weeks I've had the MyCloud, my Time Machine archives have gotten "corrupted". When backing up to MyCloud, Time Machine has returned this error twice, causing me to lose my backups and start over:

"Time Machine completed a verification of your backups on “NAS”. To improve reliability, Time Machine must create a new backup for you." This seems to be a problem with Macs and third-party network drives like this one.

The MyCloud firmware is the latest version. I restored the drive to factory condition after the latest incident. It took less than a day to see this error again. I've never had problems like this backing up my Mac to a USB or Firewire drive.

A standard drag and drop Finder copy of large numbers of files also created weird behavior on the drive -- files showing as "in use" when they are not, other files that show up and quickly disappear repeatedly in Finder.

Sure, there are "fixes" and hacks that may let me repair and use the archive for a while, but that negates the benefits, time-savings, reliability, and ease of use of a plug-and-play system that is advertised to simply work on a Mac. The WD MyCloud doesn't yet.

The bottom line is, for this Mac user, the WD MyCloud is a high-maintenance, unreliable, frustrating device. I don't recommend this device if you use Mac OS. It's a lot of trouble and you will lose data. I really wanted to like this, but it's getting boxed back up and getting returned this week.


Ab1951 11 months ago

This MyCloud isn't really that userfriendly. It often loses the connection with your network.

Enabling private shares is a complete disaster. So giving people permission to documents etc. on this NAS is giving them permission to everything on your NAS.

If you are the only user and just follow the standard procedure then you will like this device.

tiesj 10 months ago

Hello there,

Just a question. This product is NAS, that means it supports Samba and NFS(right?)

I just want to be sure it supports both of them, because DnLA doesnt support .srt files

FritzJoern 8 months ago

I’d like to place my "MyCloud" at the neighbours. Now you say: "What My Cloud does not offer … is offsite backup.", but then: "… one could use it as offsite backup by parking it at a trusted location with a reliable internet connection." How exactly do I do this please? Fritz

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