Already I had Windows 7 OS with three local disks “C”,”D” & “E”. Today I installed Windows 10 into “C” drive without deleting the remaining drives. After installing the Windows 10, only “C” & “E” drive is viable and “D” drive is hidden.
My badness: All the important items are saved in the “D” drive only. ????

can you please guide me to find the hidden hard drive?