thhyiu Ok, I got it ... I don't think this will be implemented, because it's not within reasonable scope of Files Gallery functionality. Also, there are several challenges and security issues involved ... It would require PHP curl()
enabled and allowed to download external urls. This is often disabled, and remote websites will often block it anyway. Also, it's insecure to allow remote-downloading anything directly into server.
Also, I don't personally see much benefit. If you are the server owner (admin), you could easily use SSH or WGET to download files directly to server. Or even download locally first (without copy-pasting), then mass-uploading.
Thanks for your suggestion!