If your workflow requires permanent URLs—such as for a public website, an email campaign, or a third-party app—you cannot rely on native Airtable links. Instead, you must use one of the following strategies to "mirror" your files to a permanent host: 1. Use Third-Party Hosting with Automations
As of late 2022, Airtable implemented the following behaviors: airtable expiring download url
While formulas can still reference attachment fields, the resulting links will eventually become invalid. How to Get Permanent Public URLs If your workflow requires permanent URLs—such as for
Historically, Airtable generated permanent public links for every attachment, which created a security loophole: once a link was shared, it could never be revoked, even if the file was deleted from the base. an email campaign