This is easy to set up in Slack, and better still, ensure control over which team members have access over which documents. This is especially the case if you're managing a project, or working as part of a team on a project, and need to keep all your documentation in one place. However, if you're looking to share a select few documents rather than a huge archive then Slack might just work for you. Slack isn't so much of an online file store as much as an online communications platform. +Free tier +Permission hierarchy +Generous storage