Sony HDCAM HDW-730 Operation Manual page 262

Setting the File ID
Before data is saved to a Memory Stick, it is useful to set a file ID for the
Memory Stick to identify it.
When data is saved to a Memory Stick, a file ID is saved to the Memory
Stick together with the data.
1
Turn the MENU knob to move the t mark to F. ID on the USER
FILE page.
4
2
Push the MENU knob.
The F. ID window where you can set the file ID appears.
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Chapter 4 Adjustments and Settings for Recording