FileMaker Server will store your live Streamtime database files as well as your backups in a default location on the server machine.
FMS on MAC OS X - Default Live Database Location
Macintosh HD > Library > FileMaker Server > Data > Databases
FMS on MAC OS X - Default Backup Location
Macintosh HD > Library > FileMaker Server > Data > Backups
FMS on Windows - Default Live Database Location
C:\ Drive > Program Files > FileMaker > FileMaker Server > Data > Databases
FMS on Windows - Default Backup Location
C:\ Drive > Program Files > FileMaker > FileMaker Server > Data > Backups