WD Diskless My Cloud Pro Series PR4100 Network Attached Storage - NAS - WDBNFA0000NBK-NESN

4.3 out of 5 stars 175 ratings

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  • Intel Pentium N3710 quad-core 1.6GHz processor with 4GB DDR3L memory
  • Built-in video transcoding for HD streaming through Plex
  • Centralized storage to organize media and improve your workflow
  • Quick, easy setup and a robust device manager with My Cloud OS 3
  • Comprehensive security through password protection and AES 256 bit volume encryption
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Product description

With a 1.6GHz Quad-Core Intel Pentium N3710 processor, 4GB of DDR3L RAM, and built-in video transcoding, you get a multi-purpose media server with the power to stream in HD, capacity to store all your raw files and sharing capabilities to collaborate with ease. Optimized for the plex media server, your HD videos are prepared for streaming whenever you need them, on any compatible device.

From the manufacturer

My Cloud Pro Series PR2100 My Cloud Pro Series PR4100
Ideal For Creative Professionals/Media Collectors Creative Professionals/Media Collectors
Capacity 0TB/Diskless, 4TB, 8TB, 12TB, 16TB, 20TB 0 TB/Diskless, 8TB, 16TB, 24TB, 32TB, 40TB
Processor Intel Pentium N3710 1.6 GHz quad-core (Burst speed up to 2.56 GHz) Intel Pentium N3710 1.6 GHz quad-core (Burst speed up to 2.56 GHz)
RAM 4 GB DDR3L 4GB of DDR3L mounted to dual slots (expandable to 16GB of DDR3L SO-DIMM)
Gigabit Ethernet Ports 2X 2X
One-touch USB copy button 1X 1X
USB Expansion Ports 2X - USB 3.0 3X - USB 3.0

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4.3 out of 5 stars
4.3 out of 5
175 global ratings
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1.0 out of 5 stars Defective firmware update OS 5 in late 2020
Reviewed in Canada on 13 December 2020
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1.0 out of 5 stars Defective firmware update OS 5 in late 2020
Reviewed in Canada on 13 December 2020
This review applies to WD PR4100 and all other WD NAS that have been upgraded to OS 5. All reviews that include the old model of OS 3 no longer apply. This is essentially a new product with the same name.
I bought this in December 2020 to replace an old WD NAS that I had for 14 years and it worked well. I installed OS 5 when prompted as the NAS was shipped with OS 3. OS 5 was introduced in late 2020.
I loaded 2 TB and all seemed good. Then I turned on Cloud Access. This is required to allow access from smart phones or computers not connected to the network, i.e. literally access from the cloud.
As soon as I did this, the NAS went in to an indexing mode. It is creating thumbnails of every single file so that there are icons beside the file name in the smart phone screen much like Windows does. But in Windows there are views where this is not required. There are approximately 1/4 million files in that first 2TB segment.
Indexing is only required if Cloud Access is on, and cannot be turned off without also disabling the cloud access. There is no provision of remote access with thumbnails turned off. Without cloud access, the system is probably fine. But access to data from anywhere is one the points of buying this. It is called "My Cloud" after all.
After 24 hours of loud fan and disk noise from the NAS and the CPU at 100% I took the attached screenshot. 1/4 done in 24 hours. So about 3 more days. And I have 4 more TB to load. I can expect 8 additional days of continuous disk thrashing. My total indexing time is almost 2 weeks continuous.
During this time, the NAS works on the local network, but cloud access does not until the indexing is done. So, for every 2TB of data loaded, it can't be seen online for 4 days.
I submitted complaints to the WD support site and the answer was "too bad". I have to wait until the indexing is done. There was no hint of when a fix to this would be produced. It is also impossible to revert back to the previous version OS.
Days and weeks of disk thrashing that can't be turned off is not acceptable. This product is not fit for purpose with the current version of OS 5. It has been fully updated as I have the current version, 5.07.118.
There are WD forums where this problem is discussed, and all users are livid about it. Those who upgraded existing machines have all had exactly the same response I did from support complaints. There were other complaints about OS 5, but I can't personally verify them as I did not get that far.
I have returned this defective PR4100 and will try again with another brand. No more WD for me.
When and if the OS 5 is fixed, this review will no longer apply. The hardware seems fine and it should be a good product once the firmware is fixed. I am not willing to wait for an unknown period to find out.
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5.0 out of 5 stars Serve the needs
Reviewed in Canada on 21 December 2020
Verified Purchase
kerri lynn
5.0 out of 5 stars Diskless is the way to go
Reviewed in Canada on 2 January 2019
Verified Purchase
Jwala Diamonds
5.0 out of 5 stars Working great without any failure
Reviewed in India on 20 December 2018
Verified Purchase
1.0 out of 5 stars Tengo 3 semanas usandolo y ya marca error el ventilador...
Reviewed in Mexico on 14 August 2020
Verified Purchase
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1.0 out of 5 stars Tengo 3 semanas usandolo y ya marca error el ventilador...
Reviewed in Mexico on 14 August 2020
para ser un equipo tan caro y en 3 semanas de uso mandar error del ventilador... donde se puede hacer la garantia del mismo anexo screenshot
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