What is the collective noun for files?

There isn't a single, universally accepted collective noun for files. However, here are some options depending on the context:

General:

* A stack of files

* A pile of files

* A folder of files

* A set of files

* A collection of files

Specific:

* A sheaf of documents (for official or legal documents)

* A bundle of papers (for less formal documents)

* A database of files (for digital files)

* An archive of files (for historical or stored files)

Ultimately, the best collective noun will depend on the specific type of files and the context in which you are using it.