6The Main MenuPressing the Menu button from the home screen will show you a list of actions and settingsfor managing your recorder. The main menu includes some or all of the following items:Main MenuUnmount SD card> Station InfoSample RateChannels to StoreChannels to Send3D sensor1D sensorInput AmplifierTrigger & AlarmTelemetrySettings FileStart CalibrationIf you change any settings, they are applied once you exit to the home screen. The settingsare also automatically saved to the recorder’s configuration file.Unmount SD cardIn version 3.2 of the Gecko firmware we removed the option to stop and start datasampling. Data is being sampled at all times, whether an SD card is present or not, becausedata can be telemetered without an SD card. If there is no SD card, backfilling of unsentdata will not be possible.Before you remove the SD card, you should unmount the SD card so that the system doesnot try to write data to the SD card while it is being removed, an action that can corrupt thefile, file system, or SD card.When you insert an SD card, it will automatically be mounted.