You can upload almost any kind of file to Stitch: JPEG, PNG, PDF, Word, audio, video and more.
File uploads can be made by clicking the '+' icon located in the right corner of the message entry box at the bottom of every chat room.
This will prompt you to choose a file from your local storage, or from a provider like Google Drive. Everyone in the room will be able to see and access files you upload.
When you upload a file, you have the option to give it a title and comment. This will help make it clear in the files list what the file is, as well as make it more searchable.