The MSI package size limit is around 2 Gigabytes. It should not be a problem to upload a 500MB MSI.
Technical Support Team
Intel® Atom™ Developer Program Team
Intel® AppUp(SM) Center Team
Thanks a lot for clarifying...
If for some reason you need more than 2GB (which happens sometimes with games) you may use more than one CAB file. Make sure each CAB is less than 2GB and you may use as many 2GB CAB files as you need. You will need to consult your MSI creator tool on what options to choose for this functionality. Best of luck.