Attach files to a message and they are delivered with it, stored in the channel's folder in Files, and available to every member.

Attaching

Click Attach files in the compose bar, or drag files onto it, then send. Up to five files can go with one message. The message appears for others only once the upload finishes, so nobody sees a broken attachment. On mobile, choose Take Photo, Choose Photo, or Choose File; mobile attachments are limited to 20 MB each.

Viewing

Images show inline. Other files show as cards with the name and size. Click to preview PDFs, documents, spreadsheets, images, video, and audio in the browser, or download.

Where files are kept

Each channel and direct message has a folder at Files → Chat → Channels or Direct Messages. Attachments are saved there automatically, which means:

See Files for storage, sharing, and limits.

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Post the call sheet in the job channel rather than emailing it. Everyone assigned gets it, it is in Files for the office, and the replacement photographer next week finds it in the same place.

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