The content shared at the meeting
can not be downloaded because the content is not the file itself but only the image sharing .
Also, if you do not want to download content via chat, you can not send or download files by turning off the file transfer function for the entire account .
How to turn off sending files across accounts
Set [ File transmission ] to OFF from account settings .
If you turn on the key mark to the right of the button, you can force all users in your account.
You can set My Meeting settings to ON / OFF of file transmission in personal settings