Path filter regex in GETftp processor in apache nifi

[#1]

Hello guys I'm trying to get all xls files from all folders in a ftp serveur and I'm using a regular expression in PATH FILTER regex but with no result and when I'm putting the absolute path like '/TEST/TEST/' I'm getting the files Here's the confiuration :enter image description here

Thanks in advance

[#2]

Lookup the proper java regex you need

https://examples.javacodegeeks.com/core-java/util/regex/list-files-with-regular-expression-filtering...

https://www.freeformatter.com/java-regex-tester.html

https://regexr.com/