, uncheck this box. It stops Illustrator from saving a second "invisible" PDF inside your AI file. It can shrink your file size by up to Downsample Raster Images Don't leave 300 DPI photos in a web graphic. Go to Effect > Document Raster Effects Settings and switch from High (300 ppi) Screen (72 ppi) for digital-only drafts. Adobe Community Tips Purge the "Ghost" Data
and keep the "Link" box checked. Illustrator only stores a tiny preview instead of the whole high-res image. Simplify Paths adobe illustrator highly compressed