When I travel to Shanghai, I ordered a Western Digital Purple Disk. 4TB SATA6Gb / s 64M Monitoring Hard Drive (WD40EJRX).

I paid RMB705, including free shipping. Now the price is dropped to RMB659.

The similar hard disk on newegg.ca is about CA$238.

Open the box. It is a plastic container.

Remove the plastic container, the hard disk is inside of the the anti-static bag.

I took out the WD purple disk and looked around it.

It looks in good shape. I opened the NAS and pull all four drawers. Installed the WD purple in the empty bay case.


There are four Western Digital hard disks. From left: 4.0TB WD Purple, 1.5TB WD Green, 2.0TB WD Green, and 4.0TB WD NAS disk.

Now I have total 11.5TB space on my home NAS.

WD40EJRX Specs:



Check the disk information in the NAS control OS.


David Yin

David is a blogger, geek, and web developer — founder of FreeInOutBoard.com. If you like his post, you can say thank you here

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