@IvaR my recommendation would be to read the (somewhat lengthy):
https://docs.knime.com/latest/analytics_platform_file_handling_guide/index.html#introduction
yes it is long but then you will know all about paths in KNIME which will help you in the future. Also you can take a look at this workflow that has a lot of waht you can do with Paths and URIs. Rule of thumb: you can convert nearly everything ito everything else with a little effort:
Then paths are the concept with which to locate files in KNIME. Here is how you create them: