List of item files' URLs and folder/filenames for storing the files
Credentials for the request to the source
Id of item supplying resource/metadata
Id of item to receive copy of resource/metadata/thumbnail
Credentials for the request to the storage
Description of item that will receive files
Hash of facts: org URL, adlib replacements, deferreds for dependencies
A promise which resolves to a list of the result of the copies
Copies the files described by a list of full URLs and storage folder/filename combinations for storing the resources, metadata, and thumbnail of an item or group to a storage item with different handling based on the type of file.