Sony NW-ZX2 Manual page 150

An application does not start.
[124] Troubleshooting
You want to find the product name (model name) of your
Walkman.
[125] Troubleshooting
An alarm (beep) is heard and the message [Check the
volume level] is displayed.
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You cannot use some of the applications while your Walkman is connected to a
computer as USB storage. Swipe the status bar down and then tap [Turn off USB
storage] on the notification panel. Tap [Turn off USB storage] displayed on the
screen of the Walkman.
Music player, Video player, or Photo viewer may not start while a large amount of
data is being processed. Wait until
Q&A
The model name is the alphabetical name starting with NW that is printed on the
back of your Walkman. If the Walkman is inside a case, you need to remove it
from the case to find the name.
Q&A
You can turn up the volume after canceling the alarm and warning.
in the status bar disappears.
Operation
Operation