That all worked fine granted the new drive is much smaller than the 8TB one it had in before but the process worked as they described.
Yet now that I have put the whole thing back together and power it up connected to my router I get a blinking blue light whilst I hear the drive spinning up and then the light turns red and keeps blinking.
I’ve tried the 4/40 sec resets but they don’t appear to do anything, also changed the ethernet cable and port on the router but it stays blinking red. It’s not showing on my network so I cannot access it via the dashboard.
The first question is can I use a WD Blue drive with the My Cloud?
Try another unbricking procedure. Its possible you have the newer gen 2 single bay My Cloud using the v2.x firmware. If so that unbricking process (for the older first gen v3.x/v4.x My Cloud) probably won’t work. Try the following for v2.x firmware versions: https://drive.google.com/file/d/0B_6OlQ_H0PxVQVhnLVJOdDZISUU/view
I’d also ask: how old is the 8TB drive? Is it not within the two year warranty period? What happened to it that you needed to replace the HDD, rather than get a warranty replacement?
I used your advice you posted and was able to telnet into the mycloud but once I had done all those steps it booted up and then started with the red light flashing.
I believe that the newer generation (gen 2) single bay My Clouds using v2.x firmware are denoted by having a P/N number on the bottom of the My Cloud enclosure that ends with “-10”. For example: p/n: wdbctl0080hwt-10