Ed Hanton

If you (or others) have the file storage problem, instead of deleting attachments you could consider our add-on Attachment Storage Offload. We enable storing attachments externally (either on our or your cloud storage), automatically reducing your internal Zendesk storage to the required amount, while keeping all attachments accessible through the sidebar app. (And all at a much much cheaper cost than Zendesk's typical storage add-on)

Checkout our add on https://www.zendesk.com/in/marketplace/apps/support/1002546/attachment-storage-offload/ to retain access to your attachments while reducing the zendesk storage cost! Or find more at our website, https://zd-external-attachment-storage.eh7p.com/

I have the same issue!