If you want to save your work as a JPG, PNG and possibly other formats, do not use EXPORT or quick save. These are placing size limits that are too costly to count.
Use SAVE AS and select your option. You will be presented with options (compression. color depth, color space) and the only limits in place are those created by the format itself.
If you want to reply, then
register here. Registration is free and your account is created instantly, so you can post right away.