NocoBase file storage lets you restrict uploads to a list of allowed MIME types. Someone on the official forum filled that list in correctly — application/pdf , application/msword , application/vnd. ms-excel , and the two OOXML types — and found that legacy Word and Excel files were still refuse...
Source: [Dev.to](https://dev.to/stale_orbit/why-nocobase-rejects-your-doc-and-xls-uploads-4o53)