mozilla-b2g/gaia — pull request #12077 by arcturus (2013-09-10 14:20:54+00:00)
Title: Bug 911086 - [CONTACTS] Export to Media option should only be active if there is a Media card in the device 

If we have UMS (usb massive storage) enabled we are not able to access the sdcard so both the importer and the exporter to this medium, need to check for the setting and as well listen to any changes on this.