Clean OS (Debian), OpenMediaVault and other "firmwares"

My Cloud OS 3 Personal & Network Attached Storage My Cloud
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My recomemndation if you are just trying please backup your system first please use this

http://community.wd.com/t5/WD-My-Cloud/Automatic-Full-Backup-for-WDMycloud-tested-on-firmware-V4-X/m-p/869298