My DP30 has USB, MIDI, SD Card,and a CD Drive. Of these which would be the best input to transfer my EZ tracks to the DP. I’m using an older Lenovo T500 w/Windows 7. I can also install a new version of Acid Pro’s studio if needed. It would be nice to be able to edit the drums while tracking. Thanks! PS: I’m an old analog guy from the 70s ...