OP1 saving multiple song

Hello, excuse me for my bad English.
I’m near to buy a used OP1 for a new music project but I have a question.
The project is a acoustic duo with voice/synth/drum machine and a guitar/op1. I’m the guitarist.

I want to use OP1 only for simple 4tracks base, like perc/bass/Synth, and the question is if it’s possible to save and store a tot of song (12/13 song) of timing 3/4 min each song, for a live situation.
Is it possible via USB (and then I found all my parameters on OP1) or I need to save a bounce to play in a external Daw (or pc/tablet/android)?

And how is the max time of recording of the Tape mode?

Thank’s for the answer.