I just ran a test of what happens when you remove the SD Card while the F50 is in Parking Mode.
I created an Event (bumped the F50) before removing the Card.
When the Card was removed, the LED turned Red, and the F50 began prompting "Please insert a memory card".
This continued for about (I didn't time it) a minute, after which the F50 shut down.
All the files on the SD Card were intact. Nothing lost, including the Event Video that I created before removing the Card.
I re-inserted the Card, and when I re-applied power to the Acc wire, the F50 fired up and is operating normally.
Luck??? I don't think so. But time will tell.
RodeoGeorge