my seagate external hard disk is not showing up but the blue light is showing in it .. in disk management it says that the dis
my seagate external hard disk is not showing up but light is showing on it . in disk management it says that the it is unallocated !! os-windows 8
Has it ever been used? Unallocated means there is no partition on the drive. You could create a partition and format it and use it but recovering data if there was ever any on it would be more difficult. If there was data on it I would try this first.
http://www.piriform.com/recuva Good luck!