A testing tool is provided to verify that your external storage connection is working correctly. Invoice ID (optional) - The invoice identifier for the test file. Defaults to "test-XVS-0001" Filename (optional) - Custom filename for the test. Defaults to "apie-test-[timestamp].txt" File Upload (optional) - Upload an actual file to test. If not provided, a test text file is generated Testing Steps: Click "Run Test Upload" to send a test file to the external API If successful, you'll see "OK: [filename] [url]" If it fails, an error message indicates the problem (e.g., missing API client, connection error)