So I go the normal route to manage attachments and when I select files to fins a pic, the file is empty. I also realized I have 454 pics in my files---too many maybe? Anyway, can't attach pics

I was able to do 2 just a second ago without any problem. I only have a 9 pages of them though.

Try one very small picture to see what happens, at least that is how I troubleshoot that kind of thing. If it will work with one very small picture then maybe the other picture size or resolution is too big.