Answer
Profile data is stored in three specific database tables: FNDRR_USER_CLIENT_PROFILE_TAB, FNDRR_CLIENT_PROFILE_TAB, and FNDRR_CLIENT_PROFILE_VALUE_TAB. Back these tables up periodically (through your normal database backup process) and they can be restored from there when needed. Beyond that, there's no other automated profile-backup mechanism — manually exporting individual profiles is possible but isn't a practical substitute for a genuine periodic backup at scale.