Rollback Firmware?

My Cloud OS 3 Personal & Network Attached Storage My Cloud
9

Please read these two guides and choose one that suits your level of skill / knowledge.
http://community.wd.com/t5/WD-My-Cloud/Tutorial-SSH-Method-Downgrade-v4-firmware-to-v3/m-p/812311#M23232
http://community.wd.com/t5/WD-My-Cloud/Easy-method-to-downgrade-to-previous-version-of-the-firmware/m-p/773073/highlight/true#M18956