A:Answer Hi, Sweetpea!
You can divide a file during recording so that the file is divided into two parts, and a new file number is added to the newer part of the divided file. See link for details.
NOTE: You can divide the currently recorded file during recording pause.
https://helpguide.sony.net/icd/b14/v1/en/contents/TP0000340866.html?search=divide
Happy to help,
David