New Release - WD My Cloud Firmware Release 4.01.03-421 (2/23/15)

WD is pleased to announce the update release of My Cloud Firmware Release 4.01.03-421.

  • Please follow the instructions when doing the update.

Please feel free to post your questions and experiences in this forum.


Before updating to the latest firmware, it is recommended that you’ve installed the most recent updates and service pack on your computer.

  • For Windows ® , go to the Start menu and select Windows Update
  • For Mac ® , go to the Apple ® menu and select Software Update

Resolved Issues:

  • Resolved issue of Apple Time Machine® performance degradation

like cpt_paranoia recommended:

when will this be fixed?

1 Like

Thanks for deleting my post WD!!!

alirz1 wrote:

Thanks for deleting my post WD!!!

What are you talking about?  The last post that was removed of yours was from 1/12, and it had been edited out and left with “delete” in the body.   Did you by chance post something in the wrong board that had to be moved?

Yes sorry that was my mistake. I just realized that while i had intended to post something in this thread, i somehow posted in another thread by mistake. My fault.

Not a problem.  Just making sure we didn’t miss something.

As annoying as it is to get those firmware update emails from my device I am so hesistant to update. I got burned a few months ago and had to manually downgrade. I use time machine but if the only real fix is for that, forget it. I’ll stick with my older f/w

Hallo Zusammen,

As somebody mentioned, this in version the deb-source is changed to 

deb jessie main

Note, wheezy is not 64K page aligned.

##deb wheezy main

#deb sid main

#deb experimental main

#deb-src jessie main 

So can I install the aria2, mysql and transmission and … directly from this source?

Thank you!:laughing:  

Is there a EASY was to puch this firmware?  I cant get it to update no matter what I try.   I always hang at 100%  even SSH’ing my way in and placing the file into the public folder…  Very fustrated.  

Good afternoon Bill,

I am excited to hear about the update since I am a Mac user and time machine user.  Unfortuneatly I thought this update would also fix the issue of connecting a USB external hard drive to the MyCloud or MyCloudMirror causes connectivity issues.  If you plug in the external hard drive for backup purposes you have about 10 minutes before the device loses connectivity. The only way to fix the issue is to unplug the external hard drive (via USB port).

Was I incorrect this update was to fix this issue too?

Thank you for your continued help!


Macbook Air mid 2011

Seagate External hard drive



Netgear R7000 router

Brighthouse Lighting 75

Are you using the drive in conjunction with Time Machine, or are you using it separately to copy and paste to?

Thanks for the reply Bill.

The external hard drive is used for Time Machine and for safepoint backups for the MyCloud.  Outside of those functuions the hard drive is not used.

I do not back up the MyMirror even though I have tried to plug in the external hard drive and have the same issues.

I hope I answered your question!

Thanks again,


Are you leaving the drive connected to the My Cloud, and then doing both Time Machine and Safepoint backups to it?  If so it should work.  What do you have the drive formatted as?

Updating Firmware from internet is a scary thing… since download status doesn’t change.

I risked and unpluged WD My Cloud since it stays at 0% download status for over 15 minutes,

and sicne I had latest FW 04.01.03-421 already on my local disk…

DONE – UPGRADE went well as expected, from locak disk on locak network…

To conclude: UPGRADE STATUS BAR works well while DOWNLOAD STATUS BAR does not.

All of us, your customers, would appreciate if you can fix download status bar in the future…

P.S. My internet connection is fast enough… I was downloading from your website at over 1MBps speed.

Daylight Saving Time

I have today bought a 4TB WD My Cloud and have updated to v04.01.03-421. It’s going very nicely so far!

What I do notice though is that the time shown in the web UI does not show the correct time adjusted for daylight saving - it’s one hour out. I found this post about it from about a year ago. When I ssh onto the My Cloud and run a “date” command, I can see that the time according to the operating system is correct though. It’s just the web UI that shows the wrong time.

Maybe in a future firmware this could be addressed please?

Have they fixed the issue with backups.

ive been getting the i error message from the last two updates

“Your safepoint cannot be updated due to a failed request. Please try again. (36323)”.

Its beyond frustrating at this point.

there really should be a partition on the drive itself to allow for a FULL filesystem restore.   Once the system is corrupt the average user cant fix much without knowing how to SSH into the device and force a firmware or downgrade.   I personally downgraded to version 3x and im pretty happy with it.   DNLA works good transfer speeds could be faster.  I have never tried to restore to a safepoint on version 3x as I have not needed to.  But with the 4.01.03-421 I got a dreaded cant restore error of some sort… very fustrating 


I am facing the same issue (My Cloud drive looses network connectivity after attaching external USB drive to My Cloud Drive).

I have similart Netgear R7000 AC1900 router and I am connecting WD My Book Essential 2TB drive.

Have you got any solution?


With Regards,

Kiran Nevaskar

hi Every one,

after I took last update , my WDmycloud is behaving strange again.

I lost dashboard and was not able to see it again, and all my drive appear again ( map network drive automaticly) with IP address instead. for now i accepet this , but every day all my drive stop working untill I rest the drive.

last 2 months i had issu with the update and took me time to fix everything. i started to be afraid of each update ,WD does.

Please WD , dont do update any more to the Drive, each update my drive is going backwords.

the update was successful so i dont see any reason why the drive is behaving bad.

 Please WD , dont do update any more to the Drive, each update my drive is going backwords.

Turn off automatic firmware upgrade, then…

Dashboard | Settings | Firmware | Auto update | Enable auto update | Off

A System Restore is often useful after a firmware upgrade.

1 Like