@Doron-Behar: The insync package should be enough to sync your Drive files. The insync-nautilus package adds emblems and context menus for Insync to Nautilus.
I can’t reproduce your issue unfortunately. Please check the suggestions here if they help: (LINUX) How to solve the issue “tray icon is not showing”. If the issue is still present please send your logs to support@insynchq.com for investigation: How to find the log files.