I connect the Nexus 4 to the computer (Win7), and go Computer\Nexus 4\Internal storage. I can copy from it, I can create folders, but I can not copy data to it.
I had the previous one replaced because of a faulty touch screen, I was able to copy things both ways without problem on that one. The computer I use is the same.
I can copy files onto it with ftp. Does not matter if it is the client or the server in this case.
I can also copy files if I turn on USB debugging.
How can I fix this?