Every channel carries a file library behind its Files tab, and understanding one fact prevents most confusion: the library belongs to the channel, not to whoever uploaded. Delete the uploader and the files remain; delete the channel and they go with it. Ownership is collective by design.
Uploading Without Creating Chaos
Drag-and-drop works, but habits matter more than mechanics:
- Upload to the channel that owns the topic, never to a private chat "for now" — chat files are nearly impossible for others to find later.
- Name the file for its content and state ("budget-2026-draft-v3"), because the library shows names, not descriptions.
- Create at most two folder levels. Deep trees feel organised and behave like graves.
- Post a link to the file in the channel conversation when you upload it; context travels with the link.
Co-Editing: One File, Many Cursors
Office documents stored in a channel open in the browser editor by default, where several people edit simultaneously with coloured selection markers. The desktop app offers the same co-editing when the file is opened from its library location. The rule that makes this pleasant: talk about structure in the channel, argue about content in comments, and keep edits in the document. Three parallel communication layers over one file is how drafts get mangled.
Version history is your undo button
Every saved change creates a restorable version with author and timestamp. Open version history from the file menu to compare or restore. This removes the need for "-FINAL-v2-REAL" copies entirely: keep one file, trust the history. It also answers "who deleted that paragraph" without a forensic argument.
Check-Out, Co-Authoring Conflicts, and Locks
Some formats and some organisations disable simultaneous editing; the file then shows a lock while someone has it open. If you regularly need exclusive write access, use the explicit check-out feature rather than keeping the file open all day as a territorial claim — checked-out files display who holds them and for how long.
Syncing to Your Computer
The library can sync to a local folder through the organisation's sync client, giving offline access and familiar file-explorer navigation. Sync selectively: the whole tenant's libraries on one laptop is a storage incident waiting to happen, and every synced copy is another place sensitive content rests.
What Happens When People Leave
Because channel files belong to the channel, departures are uneventful — which is exactly why personal drafts should never live in a personal folder if the team needs them. During handovers, move working documents into the owning channel before the last day, not after.
Storage is half the story; access is the other half. The next chapter covers sharing links and permissions — the settings that decide whether "internal document" stays internal.
