Hi,
I've seen a couple of posts from artists asking how to distribute their files with a slow internet etc. and I though I'd share my system.
I am not affiliated with 'CrushFTP' in any way. I just use it.
CrushFTP -
http://www.crushftp.com/ is a cloud based ftp application. It runs on almost any operating system. I have it installed on a $5 per month CentOS 6 i386 droplet from Vultr:
https://www.vultr.comYou can create a 'User Watch Folder' that has a script to distribute all files in that folder to each agencie's ftp. Upload your files once to CrushFTP and it will do the rest.
If you are uncomfortable setting the software up on a cloud server the people at CrushFTP will install it for you for a small fee ($50).
I upload a 4K video file once and then automatically distribute it to all agencies with no problems.
'hope that helps.