zoomkat:
I've tried to find the stored attached files so I could link to them but no luck. As I attach the same files over and over the names must be changed when they are stored.
The problem is the deliberate obfuscation that for no sensible reason, is implemented in the forum software. It refers to them by a "dark Web" reference; they are given a number and only ever referenced by that number using a PHP server script.
For example the image link in the first post above is "http://forum.arduino.cc/index.php?action=dlattach;topic=364156.0;attach=146178" which is not an image URL but something the PHP script reads and inserts its version of the file. You can refer to that as frequently as you like, using it as an image link, but you can never see the file itself and if the attachment is removed from the original post, the file completely disappears from all links. This is presumably the phenomenon LarryD has experienced.