A file store is a volume or partition in which files are stored.
For example, in a native (OS) file system, are considered file stores:
File systems are used on data storage devices to maintain the physical location of the files. Beyond this, they might provide access to data on a file server by acting as clients for a network protocol (e.g., NFS, SMB, or 9P clients), or they may be virtual and exist only as an access method for virtual data (e.g., procfs).
Theses file stores can vary in the features they support, and the file attributes or meta-data that they associate with files.