Android Question

Hello, I'm using a Galaxy Note 10.1 2012 and this one day an album appeared in my gallery. It had the word PC on it with some other names. It appeared out of no where and it was completely black, I can't even click on it. I had to tap and hold but that would just select it and it can't even be opened. I can't even be deleted it just stays there and I don't think it even has a setting. How do I get rid of it? And how did it get there? What is the function? Is it connected to someone's PC or something?