Use the forum search feature (the magnifying glass icon upper right). There are numerous threads discussing how to recover data. Is the My Cloud accessible in any way? Via the Dashboard, SSH, or Windows File Explorer/Mac Finder?
Here are some recent threads that mention data recovery:
http://community.wd.com/t/file-recovery-on-a-corrupt-mycloud-4tb-drive/160949
http://community.wd.com/t/mycloud-is-dead-and-need-to-recover-data/158346
http://community.wd.com/t/red-led-on-i-can-t-access-my-cloud-from-my-network-anymore/154467
http://community.wd.com/t/restore-deleted-files-directly-from-my-cloud/144093
