You can either upload large files directly (up to 500mb), or use the file sharing service of your choice. Our file upload panel now includes support for Dropbox & Google Drive so you can seamlessly transfer links to your cloud files right within your AirGigs message thread or order page.
WeTransfer is also a popular and free upload method that doesn't require you to create an account. If you use WeTranfer please use the "File" method that generates a download link to your file, and doesn't require another user's email address.
Here's a quick demo: