Firmware

How do I downgrade back to the 3.0.somthing firmware that my WD My Cloud came with without losing all of my current data?

This should work. Note that when I did it, I just changed the version number as explained below. Instead, I went to the UI to do a manual update.

http://community.wd.com/t5/WD-My-Cloud/Tutorial-SSH-Method-Downgrade-v4-firmware-to-v3/m-p/812311/highlight/true#M23232