Trying to upload a raw image from a phone?
My phone takes 5344x3006 images. They will not upload on this forum, but even if they did, that is waaaaaaaaaaaay to big to post on a forum. My Canon digital camera images will upload raw (4320x2432) but still waaaaaay too big. A total waste of bandwidth even if you have a 4K TV as a monitor (3840×2160).
But hardly anyone has 4K monitors on their computers. Need to scale it down to no more than 1200 width. 900-1000 pixel width would be better. I can do it directly on my phone (running Android Nougat), but usually do it on my computer using Paint.