fileX is a centralized, secure file transfer service from FINRA, where customers (member firms and industry participants) can send or receive batch file(s) to FINRA Applications like IARD, ACATS  etc. 

fileX supports multiple access methods to send/receive files, and a customer may choose to use any of the supported access methods to transfer file(s). FINRA/s entitlement process controls the account provisioning and entitlements which control access to various application sub-spaces. Sub-spaces are the locations within each application in fileX where customers can upload or download files.