- Turn off the device and wait 10 seconds.
- Press and hold the volume
+ button while powering on the device.
- Keep the volume
+ pressed until the Recovery mode starts (white screen).
- To move from one option to another, use the volume buttons. To select an option, press the ON/OFF button.
http://www.archos.com/manuals/A70_EN_v1.1.htm#zzee_link_94_1294044023