Thank you for your offer of help, 'drscorpio'.
However, attempting to send you a private message via both phone and laptop, I am able to write text, but, not attach a photo. There is no option to attach a photo!
In Private message there is the option where it says' 'insert other media', but one is unable to then choose a photo from phone or laptop, with the only options; 'insert image from URL', and 'insert existing attachment'.
There is an option to attach a photo in this 'public' reply, but, again, a similar notification; 'You are only allowed to upload 501.76kb' if doing via smartphone, or 'You are only allowed to upload 81.92kb' via laptop (the same image).
At a total loss!