Insert a micro sd card into the back of the rodecaster pro.
A micro-sd LED should light up in the top right-hand corner of the Rodecaster Pro display. The rec button should be green, which means you're ready to record.
If this is the first time you've connected this sd card to the rodecaster pro, you'll be asked if you want to format the sd card. You'll need to answer yes to use it, but beware: this will delete all the data on the sd card.
To activate multitrack mode, go to 'Settings', 'Advanced', 'Audio', 'Multitrack' and check that for the micro sd card, the multitrack option is enabled.
To start recording, press Rec, the button will turn red, when you're finished, press Rec again, the button will turn green.