My VIRB Elite Still Locks up all the time

I shouldn't say all the time, some days it works fine, but a lot of the time, it locks up.

If your unit does NOT lock up, what memory card do you use?

Brand
Size
Speed

Oh - and do you use any sensors?
I use a HRM and Speed and Cadence Sensor

The memory card I have is:
http://www.bhphotovideo.com/c/product/886007-REG/SanDisk_sdsdqui_064g_a11_64GB_microSDXC_Memory_Card.html

It apparently is 10MB/s WRITE speed.

Here's my situation:
https://www.youtube.com/watch?v=kvlSQ5oYU-o

Thanks,
Brad