Yada BT55797 User Manual page 16

Memory Management
Settings can be changed in [Menu > Memory Settings].
SDHC Card Format - Active memory cards can be formatted.
Memory allocation can be selected by the user according to driving environment.
Saving in micro SDHC card
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When only micro SDHC card is installed
- Driving videos are saved in the micro SDHC card .
Micro SDHC card format
- Active memory cards can be formatted.