uploaded without issue.
also managed to insert (although I admit i had to click on the file name a few times.)
read and follow the instructions posted a long time ago - including the special hints and tips.
Including Images and Attachments (as of 24 Jan 2020)
if you are on something other than a PC, check the threads with tips shared by users of Mac and mobile devices.
i recommend a file size less than 1MB if possible.