Ericsson R380s User Manual page 44

Insufficient storage space warning
The warning is activated if there is insufficient storage space and an
'Insufficient data storage space' message appears in the display. The
current store operation is cancelled.
Press or to acknowledge the warning.
•
To free up storage space, you should delete unused or old: call logs;
contacts; messages; to-dos or appointments; WAP history or
bookmarks; Notepad notes.
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