How to Hard Reset your Samsung Galaxy Tab A7

  1. First of all, press and keep Volume Down and Power button until the tablet light off. 
  2. After that hold down Volume Up and Power button together. 
  3. Let go of both keys when the Recovery Mode shows up. 
  4. Now, choose either Reboot System Now or Wipe data/factory reset. Using Volume keys to navigate and the Power button to accept it. 
  5. If you selected Wipe data/factory reset you go to Factory data reset with the same buttons as before.  This will wipe all the data from the tablet
  6. At the end, select Reboot system now with the Power button.