Sony MSW-900 Operation Manual page 261

3
Follow the procedure of steps 4 and 5 described in "4-7-7 Setting the
Shot ID" on page 4-83 to enter the file ID.
Note
Execute the file ID before saving data in the Memory Stick.
Otherwise, the file ID is not saved with the other data.
4
When you finish entering the file ID, turn the MENU knob to move
the r mark to END, then push the MENU knob.
The USER FILE page appears.
Perform operations from step 3 in "Saving data to the Memory
Stick" on page 4-126.
This file ID is stored in the Memory Stick with data.
File ID set in step 3
Chapter 4 Adjustments and Settings for Recording
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4-135