During Mobile World Congress in Barcelona, SanDisk announced their largest-capacity MicroSD card ever with 128 GB of space. Thanks to WPCentral forum member, NoRomBasic, we can see that the SanDisk Ultra 128 GB microSDXC card works with the Nokia Lumia 1520. Initial tests suggest that the card has no performance issues to worry about.
Full story from the WPCentral blog...