Bruce --
Once the upload button is clicked, a rotating circle appears up on the tab on the browser's tab bar for the open page on which I'm specifying the upload.? It continues rotating until, about 15-30 minutes later, I get the blank .../editfiles page, just as Duane reported he was experiencing, too.
Anyway, glad it worked for you.? Even if it's a goofy network connectivity/throttling issue, there would still seem to be opportunity to enhance the programming of the upload feature to provide the user better monitoring of what's going on, such as Google Drive does.
-- LBA
