Bro,better to contact nodal officers & they will resolve ur complaint soon & my suggestions is first factory default ur stb,please unplug the stb av cable,hdmi cable & power cable, signal cable & after open the stb & then unplug the hard disk cable & try bro, & also check ur hard disk warranty on hard disk website warranty check
Go to system settings and then in system details press 0 & 1 and then select a new option will come to format disk and then format it and see whether thr problem still persist