You can share a file across your space with one simple click without having to upload it multiple times.
To access and use the File Explorer: Click on a conversation to open the details pane or create a new conversation. Click on the paperclip icon to select a file. Choose the “Select existing file” option. You can search for a file available in the space you are already in. Use the filters, folders, and search to help you find the file you want. You can even select multiple files! Once you’ve finished selecting files, click the “Done” button to upload these file(s) into the conversation. You can upload any file that has been shared with you.