Galaxy wont reset/reboot

[AC Question]

My samsung grand prime will not boot up. When i hold power volume down and home i get downloading target message. When i hold volume up power and home and do a factory reset i get a dm verity error message. Please help.

 

[the tall guy]

Hi, are you able to boot the device in to safe mode, does that work? when did this problem start to happen, what were you doing before it began to act up?