My 1 tb WD external hard drive is not visible in my computer. Its visible under disk management but shows unallocated.Its also visible under device manager. I can format it but first I need to recover the data. I've tried many recovery softwares (EaseUS data recovery, EaseUS partition master, Minitool partition wizard, Stellar Phoenix data recovery, Testdisk) but non of them works. I can see the drive in all these apps but when I start scan it doesn't find anything. Please help.