"MyChat Client (Android)", "Main screen", "Tools", "Announcements".
A list of announcements on the board:
This list contains all the announcements ever left on the board. By default, relevant ones are the first.
Also, choose a range of messages to upload: "week", "month", "half-hear", и "for all time".
Download files attached to a message by tapping on the option with the number of attached files.