Thanks for your reply and kind comments. I am glad to hear that my poor explanation was helpful.
I think the speed in uploading depends only on the internet speed of the cable the computer is connected.
In my computer your big images appears instantly.
Hope you to succeed in uploading big size images next sketchcrawl.
Seeing the big size images I loved them in color and density in those drawings.
I'm happy about that you enjoy the Korean green tea.
Good luck and my best regards to Jeff too,