[WPCentral Question]

can I use sandisk ultra microSD 64 GB class 10 memory card in my lumia 720 which runs on wp 8.1 GDR1 developer preview

[Sooraj Prabhakar]

To be simple.... Yes

[xandros9]

There's no real reason to think otherwise in modern devices.
If it fits, it should work.

[InvisGhost]

There are some known issues with Huawei devices and SD cards so it's a valid question, although the answer is yes.

[cjloyola]

Go for It.