how to leave a group and remove their files

I am a member of 2 groups with colleagues, one of which I no longer need to access but it is taking up 60GB of local storage on my laptop. I have selected under 'preferences' to no longer sync with this group but would like to remove the files that are stored locally within it. How to I do this given that I also have another group that i am an active part of and i want to retain these files? thanks
Sign In or Register to comment.