D-Link DCS-4602EV User Manual page 45

Section 3: Configuration
Size of each file for recording: If this is selected, files will be separated based on the file
size you specify.
Time of each file for recording: If this is selected, files will be separated based on the
maximum length you specify.
File Name Prefix: The prefix name will be added on the file name of the
recording file(s).
D-Link DCS-4602EV User Manual 45