Encountering a "file not found" error means the link you clicked directs to a file that the hosting service cannot locate. This typically occurs because the file was deleted, moved, renamed, the sharing link expired, or your access permissions were revoked after the link was sent. It differs from generic errors by specifically indicating the target resource is unavailable, not that the system itself is down.

For example, someone may share a link to a critical spreadsheet in Google Drive for team feedback, but later delete that file version by accident, causing the link to break. In another case, a shared OneDrive presentation link might expire after a preset time, rendering it inaccessible even if the original file still exists in the owner's account.

While troubleshooting steps are straightforward, limitations exist: you have no control over the original file or its settings. The main recourse is contacting the link provider to request a valid, active share link. Ethically, respect permissions and only request authorized files. If unable to reach the owner, the file cannot be retrieved independently. Future platforms might integrate smarter notification systems for deleted resources.