Fieldguide only supports uploading files that are less than or equal to 1.12GB in size. For ZIP files only, Fieldguide supports up to 5GB in size. If you need to upload a file that is greater than this in size, consider these solutions:
Break the file up into smaller pieces. For example, you can use a video editing software to break a single video file into smaller videos.
Convert the file to a format that would reduce the size. For example, you can convert an Excel file to .csv format.
Compress your file into a ZIP file or a similar format.