Can I bulk delete specific items and files from a site or a site collection?

Mass (Bulk) Delete by Report

This feature is accessible from the Ribbon and Tools menu and provides the unique functionality of deleting contents from a site or site collection based on the Site/List Content report.  The content may reside in any site, sub-site and list. 

STEP 1)      Generate a Site/List Contents Report. Edit the report in Excel to filter out any items that are to be deleted from SharePoint.  A convenient way to do this is using the Filtering option in Microsoft Excel.

STEP 2)      When you are satisfied that the items remaining are the ones that should not be deleted from SharePoint, highlight them and delete them from the report.   The remaining items in the report will be processed by the Mass Delete feature.

STEP 3)      Save the file in a convenient place.

STEP 4)      Select the Mass Delete by Report feature and browse to the .csv filed saved in the previous step.

STEP 5)      Check the Delete folders option if you wish to have the folders removed as well.

STEP 6)      Press Finish to begin the process.