Hi, try using Nexus Media Importer. Works like a charm for me and it has an extra plugin for total commander as well. Only downside is that it's a bit pricey, but it's imo the best working by far, looked for Free alternatives but couldnt find ones.
E: Oh, just noticed it's about literally mounting and not just opening files etc. that won't work with nexus media importer, sry!
Sent from my Nexus 7 using XDA Free mobile app