https://slack.com/help/articles/360035940353-File-storage-in-Slack indicates the file storage quota on Slack for each plan:
| Plan | File storage |
|---|---|
| Free plan | 5GB total for the entire workspace |
| Pro plan | 10GB per member |
| Business+ plan | 20GB per member |
| Enterprise Grid plan | 1TB (1,000GB) per member |
My Slack plan type is Enterprise.
https://www.technipages.com/slack-view-workspaces-analytics shows:
but I don't see the "file storage used" on my side on https://my.slack.com/admin/stats