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