According to the BACnet protocol documentation:

Defines a standardized object that is used to describe properties of data files that may be accessed using File Services.

Objects of type file have the following properties:

•archive

•description

•fileAccessMethod

•fileSize

•fileType

•modificationDate

•objectIdentifier

•objectName

•objectType

•profileLocation

•profileName

•propertyList

•readOnly

•recordCount

•tags