I am trying to upload a design to amazon merch. I am doing transparent png 15 by 18 at 300 dpi. Which is the amazon guidelines. The uploader just goes and goes and fails every time. Then I noticed it's supposed to be under 25 mbs. However a blank transparent png is 96 MBs by default. That's blank before any designs are even added! Trying to flatten image makes it not transparent. It's supposed to be transparent. I even tried Amazons crazy templates but they make no sense and the layers are not supported unless you have the 600 dollar photoshop.