This is what I did to rebuild my drive from soft brick. You can use this to upgrade your My Cloud to whatever side you want.
Got the image. Used Ubuntu and restored it to the drive. All I have to do now is to resize the ext4 partition - sda4 and I’ll be back in business again
This is what I did:
-load up a live Ubuntu drive on a computer and attach the WD drive to the machine - take ie out of the case and use a USB adapter or a SATA/ESATA cable.
-download the image from the link above and extract the IMG from there.
-start Disks application and select the WD drive.
-click on the gear and select ‘restore from image’ for the whole drive
-point to the downloaded image
-run fsck on the 4th partition
-for me, the device was mounted as SDA
-start GParted and extend the sda4 partition to fill up unused space
-put back in case and boot up
You now have a fully working drive in ‘just out the box’ condition.
EDIT: Here’s the 3TB image.
Use this for a 3TB drive and skip the GParted part. I still recommend doing a fsck.
My guide should work on any size drive, so you could theoretically put in a 6TB drive in the enclosure and you should be able to set it up using this guide.