I'm somewhat of a newbie to Mac having purchased my first MBP this week. I bought an absolutely immaculate machine from a Café member. So far so good. Big learning curve to go through compared to windows. I purchased a 4TB USB drive to use with Time Machine. Is TM the best option? Does TM make full backups, incremental, both or is there a way to choose? I do not intend to have the backup drive connected all the time. Only when backing up.