File sharing & storage
File sharing looks free until you bump retention caps, then admins are either deleting old uploads by hand or paying extra to keep them.
Ce que les utilisateurs disent vraiment
✕Free workspaces cap file storage at 5 GB across the entire workspace — once you hit it, new uploads fail and admins have to manually delete old files to make space.
Source : Slack, Free plan feature limitations ↗✕Users describe constantly running into the 5 GB ceiling sharing screenshots and videos, calling the cleanup workflow tedious and risky — easy to delete the wrong thing.
Source : sto.care, File too big for Slack ↗
Uploads go straight to your own S3 (or Cloudflare R2) bucket via presigned URLs, with thumbnails generated by a small Lambda or Vercel function. Retention is a Postgres column and a nightly job, not a tier upsell — and storage cost is fractions of a cent per GB, not a forced plan upgrade.