Suddenly my external drive that I was using for Paragon backup of my C drive is showing as RAW in Disk Management when it used to be NTFS. So now I cannot see it in Windows explorer. Strangely, Paragon HDM says it is NTFS and sees the directory structure. If I try to do a Convert File System, Paragon fails with an error message saying Invalid Cluster size. How do I get my disk back? Help appreciated please.