Does Nexus4 supports a use a USB pendrive (up to 64Gb)?
If yes, with the USB OTG is I can navigate in the folders of the pendrive from the smartphone?
Is it possible to copy file from pendrive to N4 and from N4 to pendrive?
Nexus 4 does not officially support USB OTG. But rooting and modding the software can do the trick. Here's a handy guide I found!
The Nexus 4 doesn't officialy support USB OTG. It is possible with a custom kernel. But for this you need to unlock your bootloader.