[GUIDE] Debrick a completely dead MyCloud

My Cloud OS 3 Personal & Network Attached Storage My Cloud
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As I told you yesterday, my cloud is 3tb gen1. I have followed the steps in this tutorial: [GUIDE] How To Unbrick your 2TB/3TB/4TB My Cloud and I had a serious problem. As I mentioned, I kept the original partitions on my disk although I could not access the cloud due to a power cut. use the 3tb disk copy that corresponds to mine. I downloaded that blank disk copy from the link there. I followed all the steps but once the whole process was finished I went to Gparted to see how everything had turned out and my surprise is that all the partitions had disappeared and I had a blank disk without a partition table and now it lets me create the partition table again . Would the disk be corrupt or would it have been damaged when doing the process?