I figured it out, and as I said, every site is different. On this site when I open the Attachment Manager I cannot just drag a pic from my Olympus Master program. I store all my pictures there and on most sites I can just drag them over. . What I have to do is click on 'Select a file to attach', and that opens a window in my Windows 10 'this PC- pictures', go into my Olympus files, click on the pics, and take the pics from there. Then they get stored in the Manager and when I hit 'POST', there they are. Whew. Took a while but I get it now.