The Nexus 7 (and all ICS/JellyBean Android devices) only support MTP and PTP, not Mass Storage - as such no v4+ Android device can be used in the Nexus 7 (note that any external devices such as SD cards can use MS, but not the internal storage, which is all that is possible on the Nexus 7).
The Nexus 7 (and all ICS/JellyBean Android devices) only support MTP and PTP, not Mass Storage - as such no v4+ Android device can be used in the Nexus 7 (note that any external devices such as SD cards can use MS, but not the internal storage, which is all that is possible on the Nexus 7).