I have a file that is supposedly 42m. As it appears in the folder. When I open it, it is only 19m on my "image size" box. I need this file in the higher resolution possible, as I need to print a large banner. But as for now all I have is a 19m file with only 150 resolution 
and i don't know why? It is supposed to be a 42m file. Confused.
Thank you for any quick answers!