Forum Discussion
Teams Channel Posts and the Files Folder
When people post images or files into a Teams Channel conversation, Teams automatically saves that image or file into the main Files directory for that channel, rather than in a more suitable locatio...
Just wait till CoPilot starts going through all these screenshots and outdated docs that are posted in these channels! 
The best I found we can do for now is to designate team owners who are responsible for cleaning their own yards (ie files in channels) from time to time.
In addition to file management, they need to manage their channels, members, recordings, external contributors etc.