My hard drive (500GB, 200GB used) cannot be partitioned. I tried MiniTool Partition Wizard, AOMEI Partition Assistant, GParted and they cannot partition my disk. In DiskGenius my disk is shown as FDD (floppy disk). Is there a method to convert FDD mode to HDD mode without loss of partitions and data? DiskGenius has such option but it say it would delete all partition and files.