Trying to add a 4TB USB 3.0 Western Digital PASSPORT external drive to the router. I cant access it. No files are found. Trying with my Windows PC and my phone. However when I add a 64GB thumbnail USB drive it works on my windows PC and my android phone.

Is there a drive size limit? Its formatted as NTFS. When I plug it into my PC, all the files are there. Plugged directly into the router, there are no files to be found.

Help please. Thanks in advance