Walkthrough
Keep related photos together, put groups in your preferred listing order, then arrange the photos within each group. Sorting the processed files by name, ascending, follows that sequence. Check the final photo order in the MLS or website after uploading.
The Standard format produces 123-Oak-St_01_Entry-02.jpg: the address, room number, room name, and photo number. The room number keeps groups together; the photo number orders the views inside each group.
Leading zeros matter: 01, 02, … 10 stay in numeric order during text sorting, while 1, 10, 2 can appear out of sequence. Room and photo numbers use two digits by default.