First u have to use an external card reader coz 99% of the problem is that i mean do not use ur laptop card reader but use a multicards reader coz laptops card reader r not designed for micro sd 64Go once u plug in ur micro Sd u should run a small software BOOTICE ( it's been attached to this...

I found the solution to ur problem coz i had to fix it me tooo u can email me plzz wimoad@gmail.com