Smartsheet change history: 503 Errors on File Upload

Smartsheet reported a major Brandfolder Asset Upload incident with 503 errors and degraded uploads, starting 2025-07-07 01:25 UTC and resolved at 2025-07-07 04:29 UTC (3 h 4 min). A primary file upload service failure prompted redirection to a backup, with temporary UI changes and some cloud uploading options unavailable during mitigation.