The Borg called him 'primitive'. Said he'd be obsolete. In a quadrant of Borgs...what would Data do? Typically, the Borg thing to do would be to ignore him. He can't do much by himself. I suppose the Queen might show up to chat with him for awhile, but frankly, I think she'd get bored with him.
So what would Data do? Become a historian? Collect the known history of all the assimilated species, attach it to a transwarp probe and shoot it to the Andromeda Galaxy?