system/bin/sdcard consuming lots of battery and processor on miuiv5.8.6

I have ported a miui v5.8.6 rom for my Canvas Knight A350 from some other phone having the same processor. All bugs were fixed but i get to know abt one issue, a script of system/bin/sdcard is consuming around 60-70% of my battery and is utilizing around 50% processor all the time. Plzzzzzzzzzz help .......................:(:(:(