What is a USR file? USR file is a FileMaker database file in a specialized format utilized by FileMaker Pro, a powerful software application designed for creating, organizing, and distributing databases. This file serves as a container for user-specific databases, housing data and related components in a proprietary structure unique to FileMaker. With FileMaker Pro, users can efficiently import data from various sources, such as text files, Excel documents, or Bento databases.