Lasted news from mt card official: the mt card hardware v1.4 released.
This update improves Eshop ROM compatibility and supports .3dz ROM .
It is an hardware update, just directly update your MT card（any version） to V1.4. While updating, don’t disconnect the USB cable. This update works with V.12 launcher.dat.
For” * .3ds “game, save file is” *.sav”
For ” *.3dz” game, save file is“ *.zav”
For NAND backup games（card2）, the backup data directly stored in the ROM, don’t rename the file extension. If you once rename the file extension, when you enter the game, the backup data will be deleted.
1.Hardware update(VIA USB)
1.1 Enhance Eshop ROM compatibility.
1.2 Support .3dz ROM.(support online play)