That's a bit confusing. So, you have a yahoo mail account and tried to attach a photo to a mail. And you did that in your browser? There is no need to open a second mail account with Microsoft. I recommend you just try again with yahoo.
Thank you very much for trying to understand and help me. I was trying to copy a folder containing pictures, but finally did it one at a time which is probably what one is suppose to do. I will definetly use this site in the future, thanks.