I'm using an acer 720. I'm having trouble editing pics offline. I take the sd card from my camera, put it into the chromebook and then drag the folder with the pics in it into a folder in downloads. So far so good. I open a photo then click the editing pencil thing and try to crop it but after clicking enter the blue circle thing just keeps revolving forever. It never stops and when I finally close the picture down it is no longer viewable in the folder, it's just a greyed out icon. What am I doing wrong?