just created an account in this forum to thank you.
really appreciate your effort in testing this. just got myself a hero3 black which is now cheaper in Malaysia and Googled for file sizes. your post has definitely helped!
I have to go for a trip tomorrow but once I am back, i'll key in the data in an excel/spreadsheet and share the image or perhaps Google Docs so it can be updated and shared for others too.
a possibility is to test the filesizes for other models too, and create an online spreadsheet for this.
regards from Malaysia