I have an advisor who is very supportive. She responds quickly, offers advice and helpful edits (often on a short turnaround from my own delays), and seems invested in my doing well in the program (Social Sciences program in America). However, I have, over the years, come to observe that she is prone to seeing others for ways she can "use" them, and has displayed at times disrespect for others' time, etc. So that's made me put my own guard up to look for the same treatment of me. She helped facilitate my funding for the year (but it's funding for me to do work for another agency), so I think strictly speaking, I owe that agency 20 hours/week, and my other time is meant for degree progress (part of which is receiving mentorship from advisor). But I know that sometimes, much of my week goes towards helping my advisor with her stuff. Her grants, projects, pilot data, administrative work, journal article reviews, etc. The most agitating are absolutely menial tasks like picking up her mail and moving it from one building to another.
So I am wondering...at what point am I just a great advisee, with whom she produces some good work, and for which she will be a long-term (career-long??) mentor and friend and recommender... and at what point am I just being used for free labor?
Edit: The mail pickup is not just junk magazine/letters..but packages and such, some of which may be for my specific studies. But there have been times when, even for packages that are NOT for my studies, I've been asked to do X,Y,Z with them.