This workflow will allow you to provide a list of folders and subfolders with a number of users and delete only the folders and subfolders that contain 0 users. However, in case a folder has 0 users, it will also check if all subfolders also have 0 users.
For example if a subfolder /marketing contains 0 users but in marketing/internal there are users, it will not delete the /marketing folder. You can change the table reader to another file reader, but the format has to be similar.
To use this workflow in KNIME, download it from the below URL and open it in KNIME:
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