I am having issues with a USB connected hard drive on my C1200 router.  When accessing the connected drive, I can view all files and folders just fine on a PC.  However, when accessing via a PS4, some of the folders are not displaying correctly and are in a "folder" called "null". Within this null "folder", the missing folders are displayed with their correct names.  All files are present and play just fine, it's just annoying.  Looking for ideas as to why this would be happening.