My cloud stopped working, solid yellow

Disk recovery services are extremely expensive and typically are a 50/50 shot at recovering any data (in my experience).

One can remove (called “shucking”) the hard drive from the My Cloud enclosure and attach it to their computer using a; USB to SATA adapter, a USB docking station, or a spare SATA port on their computer. Plenty of YouTube videos detailing the shucking process. Because the My Cloud hard drive is formatted for Linux one must use a Linux driver on Windows to be able to read the drive contents. Plenty of past discussion on how to do so. One such past discussion:

Linux File Systems for Windows by Paragon Software
https://www.paragon-software.com/home/linuxfs-windows/#

Ext2Fsd Project
http://www.ext2fsd.com/

One can attempt to “unbrick” their My Cloud drive to get it back to working order. Note: Many unbrick methods involve deleting the drive’s contents before restoring the My Cloud firmware to the drive. Backup your data from the drive before attempting one of the various “unbrick” procedures. Use the forum search feature, magnifying glass icon upper right, to find the many past discussions on how to “unbrick” a My Cloud drive.