Acer eMachines Series User Manual page 47

The Create Factory Default Backup dialogue box opens.
This dialogue box tells you the estimated size of the backup file on your USB
flash drive.
3 Plug in the USB disk, then click Next. You will be shown the backup
progress on the screen.
4 Unplug the USB flash drive and mark it with a permanent marker.
Important: Write a unique, descriptive label on each backup, such
as 'Windows Recovery Backup' or 'Apps/Drivers Recovery Backup'.
Make sure you keep the USB flash drive in a safe place that you
will remember.
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