As you already know guys instances consists of the various databases which are associated with SFB server and below are the type of database files which are used to store data and transactions logs both
Data and Log Files for Central Management Store
Central Management store database files
Data file or log purpose
Xds.ldf
Transaction log file for the Central Management store
Xds.mdf
Maintains the configuration of the current SFB server topology, as defined and published by Topology Builder
Lis.mdf
Location Information service data file
Lis.ldf
Transaction log for the Location Information service data file
Data and Log files for User, Conferencing, and Address Book
Core SFB server database files
Data file or log purpose
Rtc.mdf
Persistent user data (for example, access control lists (ACLs), contacts, scheduled conferences)
Rtc.ldf
Transaction log for Rtc data
Rtcdyn.mdf
Maintains transient user data (presence runtime data)
Rtcdyn.ldf
Transaction log for Rtcdyn data
Rtcab.mdf
Real-time communications (RTC) address book database is the SQL Server repository where Address Book service information is stored
Rtcab.ldf
Transaction log for Address Book Service
Rtclocal.mdb
Hosts the conference directory
Rtcxds.mdf
Maintains the backup for user data
Rtcxds.ldf
Transaction log for Rtcxds data
Data and Log Files for Call Park and Response Group
Application database
Data file or log purpose
Cpsdyn.mdf
Dynamic information database for the Call Park application
Cpsdyn.ldf
Transaction log for Call Park application data file
Rgsconfig.mdf
SFB Server Response Group service data file for the configuration of the services
Rgsconfig.ldf
Transaction log file for the Response Group application configuration
Rgsdyn.mdf
Response Group service data file for runtime operations
Rgsdyn.ldf
Transaction log for the Response Group service runtime data file
Data and Log Files for Archiving and Monitoring Server
Archiving and Monitoring database files
Data file or log purpose
LcsCdr.mdf
Data store for the call detail recording (CDR) process of the Monitoring Server
LcsCdr.ldf
Transaction log for call detail recording (CDR) data
QoEMetrics.mdf
Quality of Experience data file stored from the Monitoring Server
QoEMetrics.ldf
Transaction log for Monitoring data
Lcslog.mdf
Data file for the retention of instant messaging and conferencing data on an Archiving Server
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