Sony FDR-AX40 Operating Manual page 21

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To format the recording media
• To ensure stable operation of the memory card, it is recommended to
format the memory card with your camcorder before the first use.
• To format the memory card, select
Settings]  [Format]  desired recording medium 
• Formatting the memory card will erase all the data stored on it and the
data will be irrecoverable. Save your important data on your PC, etc.
 [Setup]  [
Media
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GB
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