@medloh    That is the correct solution here, the filename is always stored in a FlowFile attribute named "filename". Using the updateAttribute processor is the easiest way to manipulate the FlowFile attribute.   You can use other attributes, static text, and even subjectless functions like "now()" or "nextInt()" to create dynamic filenames for each FlowFile. https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html Hope this helps, Matt ... View more