Create new volume and all data erased

Hi everyone, I’m new here, I hope youe can help me. The thing is that I have a Drobo Pro, attached to a computer with usb cable, in the dashboard I went to volumes and create a new one by the full size of the Drobo, there were no warning message or anything that says that if I create a new volum of the full size the information that was on the Drobo will erased, after I create the new volume the drobo restarts and when it starts all the information was gone, can somenoe help me with this issue? I need to revocer my data.