Asus DSL-AC52U User Manual page 24

Safely removing the USB disk
IMPORTANT: Incorrect removal of the USB disk may cause data
corruption.
To safely remove the USB disk:
1. From the navigation panel, go to General > Network Map.
2. In the upper right corner, click
the USB disk is ejected successfully, the USB status shows
Unmounted.
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> Eject USB disk. When