How to purge files from 'Bursting'directories?

Hi,

We have a very large amount of '*.XLSX' reprorts that were generated by bursting. These reside on the NR server in directories we created. There are literally thousands and thousands of these. How can we purge these directories? We cannot do them one by one in the tool, so looking at an automated method such as EPM Automate etc.

We have investigated EPM Automate commands: listFiles, deleteFile etc. However we can't seem to be able to produce a list of directories and file names that we can then pass in through some batch scripts to loop and 'deleteFile'.