Synchronization of simultaneously captured media in a multi-camera system is performed using a consistent file structure within the cameras. A primary camera receives a bitmap describing the file and folder utilization of each of one or more secondary cameras. The primary camera selects a folder number and file position number that is commonly available across all cameras. The primary camera directs the secondary cameras to store subsequently simultaneously captured media content at the selected file number and folder position number. During post-processing, simultaneously-captured content is accessed based on common folder numbers and file position numbers. A post-processing system compares a timestamp associated with each content file in a group with matching folder numbers and file position numbers to identify false positive groupings.