I currently live with a family member. We both have our own gold accounts and separate profiles. Both profiles are on the same hard drive right now. He has already beat gta v and I want to start playing it. Is it safe for me to play it on my profile and
save the game without messing up his save file? Thanks
Yes, it is safe for you to start a new game and save it. The save files are connected specifically to a profile. What this means is that your profile creates one and so did his. As long as you don't delete a save file manually, you'll be good to go.