We restrict the limit to 30mb so as to not compromise the system for everyone. If we went unlimited then a small majority would have probably upload there life's work and we didn’t want that potentially causing issues to the vast majority.

What we recommend for larger files is to use free services like Dropbox, Amazon S3, OneDrive etc and put the URL to the product in the system. The system then protects the download link from being visible to the user so there is no issue with doing this.