can't delete folder

Just got an N5 and am in the process of combining the data from 2 other drives. Moved the data to a public share then figured out that some of the data belonged on a users share. got the data moved but now I can’t delete the empty folder on the public share. asks for admin permissions. tried changing the permissions from a win 8 (same one that created the folder) but the changes won’t take. How do I delete the empty folder?