I think with photo's ...to upload from your computer it can be saved to a file and then chosen from there. From a smart phone...if you've taken a picture, at the top (usually) of your screen click on the little icon that looks like a tinkertoy....then you can choose a method to 'send' it to your email. From email, you can save to a file and repeat as necessary.

This is only if you don't have access to your computer at that moment. Otherwise connect your phone to the computer using the cord plugged into the usb port on your computer and download it that way.

I'm not brill about computers but I've managed to fight my way thru most of the confusion lol Hope this helps some