Vague question, so here are some forum posts to hopefully get you started, then we can narrow down what you are wanting to do if they donât answer all your questionsâŚ
This one talks about reading and writing to a USB stick plugged into the EPIC. If you donât want to use the USB stick, just change the path to the one you see in groov Manage.
This one talks about doing the reading/writing from PAC Control. The bug the guys talk about has been fixed and so you should be running BOTH the very latest EPIC firmware and PAC Control software.