With the datastore and files workflows, you can delete a list of files, find unused files in a datastore, and others.

Delete all files
Deletes a list of files.
Delete all unused datastore files
Searches all datastores in the vCenter Server environment and deletes all unused files.
Export unused datastore files
Searches all datastores and creates an XML descriptor file that lists all unused files.
Find unused files in datastores
Searches the vCenter Server environment for all unused disks ( *.vmdk), virtual machines ( *.vmx), and template ( *.vmtx) files that are not associated with any vCenter Server instances registered with Orchestrator.
Get all configuration, template, and disk files from virtual machines
Creates a list of all virtual machine descriptor files and a list of all virtual machine disk files, for all datastores.
Log all datastore files
Creates a log for every virtual machine configuration file and every virtual machine file found in all datastores.
Log unused datastore files
Searches the vCenter Server environment for unused files that are registered on virtual machines and exports a log of the files in a text file.
Upload file to datastore
Uploads a file to an existing folder on a specific datastore. The uploaded file overwrites any existing file with the same name in the same destination folder.