(null) folders

I was doing some organizing on my external hard drive that’s connected to my router and now I see many folders named “(null)”. When I access the hard drive from my laptop, all the folders are fine but if I try to access the hard drive in Infuse whether it be Apple TV 4, iPad, or iPhone, I would see the (null) folders instead.

Anyone know what I can do to fix it?

Thanks in advance!