If your artwork is larger than 300MB, you will receive an error when you try to upload the artwork to a project. Here are some steps to help you reduce your file size.
These are the 2 Illustrator tips that will help you and us save time and space.
These are the 3 Photoshop tips that will help you and us save time and space.
File size reduction depends on how much imagery is outside the boundary. It may be many Megabytes or few.