Grundig 30GB - Manual (Page 80)

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4.
Press the [REC] button long to finish recording.
The recorded file is stored in the ‘Record’ folder of ‘Music’ folder.
5.
Press the [MENU] button shortly to exit the audio record menu and
return to the main menu screen.
Recorded file format indicates the record time and date.
- L041212_162030.MP3: Line input audio record file
- C041212_162030.MP3: Microphone input audio record file