Assigns numbers to files in sequence even if the recording folder or
the “Memory Stick Duo” media is changed. (When the replaced the
“Memory Stick Duo” media contains a file with a number higher
than the last assigned number, a number one higher than the largest
number is assigned.)

Reset

Starts from 0001 each time the folder is changed. (When the
recording folder contains a file, a number one higher than the
largest number is assigned.)