Delete Old Reports Saved In Shared Folder

Hi All,

I subsricbe few reports by data driven file shared method. Each reports is supposed to be delivered to 5 different customers. But each customer can see only his/her data. So I use a paramter to generate 5 different reports for each customer. But once the five different reports are saved in the shared file folder, is there any method to delete old files? These reports are to be executed once a week

Thanks