I've tried to link a 32gb USB flash drive to my Google Nexus 7 via a USB OTG cable but can't make it work. The Nexus 7 won't play music or video or even let me view photos using either Nexus Media Importer or the Nexus Photo Viewer. Both apps display 'Unsupported File System exFAT'.  Can anybody help as it is very frustrating to see all the posts from people who say it just works!