Hard Reset ARCHOS 101 G9 HDD

First method:

Start by switching off the tablet by holding the Power key for a short while.
Then press and hold the Volume Up and Power button for a few seconds.
Release held keys when the device shows the start up logo.
Keep the Volume Up pressed until the Recovery mode starts.
Afterwards choose from the menu Wipe Data/Factory Reset or Format System by using Volume buttons to scroll and Power button to select options.
Tap "yes" to confirm if you are 100% sure you want to clear all your data.
Press Power button to enter option "reboot system now".
Cogratulations! The hard reset has just been performed.