If you have a cloud account, images can now be stored on your account through the image manager, which you can find when you change an image for a Pilot, NPC, Mech, or map. I'm starting everyone off with 250MB max, just until I see how usage is going to shake out. If you don't want to use this feature for whatever reason, there's a remote image option that will accept any valid linkable image URL.
Keep in mind this feature is in beta (a backport from the upcoming COMP/CON v3), so there might be some rough edges and rollbacks, though I will try to keep any of that to an absolute minimum. Thank you again for your patience! -- Beef