See the following scenario depicting how the file storage works in the BI platform.

Administrators need to ensure that the FRS status are Running and Enabled at all times to manage the storage and retrieval of various BI documents. To resolve document processing, versioning and sharing issues within the BI environment, the first step is check if there are any issues related to FRS and the File Store Directory used to store BI documents.
Before we cover how to verify the correct behavior of the FRS, let’s cover some the FRS role and properties.
There are two types of FRS, the Input and Output FRS. The Input FRS stores any object a user saves to the BI platform. The Output FRS stores successful instances (a copy of the original report with saved data) that is generated by the Adaptive Job Server.