4Tb Drive Mounted to a 2Tb Board

I have a 4Tb My Cloud external hard drive. It quit working and would not power up with the provided power supply, so I found another WD power supply with the same power output rating. When plugged in it lit up and acted like it wanted to power up, but nothing happened. I took it to the local computer shop and the tech removed the drive, hooked it up to his computer and said he could see the drive, see that it had files, but was unable to look at the files or retrieve them. He concluded that the computer board that comes with the drive is probably bad.

He suggested that I could either send it to WD and have them recover the files for a fee, or I could possibly purchase a refurbished My Cloud unit and swap out the drives.

I went on to Ebay and found a certified refurbished 2Tb My Cloud drive. When I swapped out the drives, it powers up, the LED blinks blue, and then it blinks red.

Is the computer board only programmed for a 2Tb drive? Is there a way to make it work?

The question becomes what is the model number on the two My Clouds. There is a gen1 and a gen2.
You can’t put a gen1 formatted disk on a gen2 board. part number ending in 00 is a gen1 and ending in 10 is a gen2.

In addition to what Rac8006 said, the My Cloud motherboard is not programed for a specific sized hard drive. If you search this subforum (magnifying glass icon upper right) you will find more than a few users who have replaced the My Cloud hard drive with a larger (or smaller) hard drive.

The firmware that drives the My Cloud resides on the hard drive not the motherboard. Like Rac8006 indicated you must find out what the current My Cloud version is and use the same version, if possible. Otherwise you will have to use on of the various unbrick methods (again search the subforum) and wipe the drive (and its data) to install a different model’s firmware.

One can use Linux or a driver for Windows to access and backup any user data from the My Cloud hard drive.

Thanks for the help. I checked and my old drive is a gen1 (00), and the new/refurbished drive I bought is a gen2 (10).

On the bright side, I did purchase a fulling functioning 2Tb drive, so it’s not a total loss. I’ll see if I can grab the data off my drive using a dock (I think I still have one). It’s not time sensitive to get the data, so I’m not in too big of a hurry. The drive itself seems to be operating fine, so I don’t think it’s bricked.