In the beginning of June 2013 I acquired a GoPro Hero 3 White to document my bicycle rides (also see my first article).
Unfortunately this copy turned out to be a real flop :-(.
The first test recording was also the only one which worked. Nearly all other attempts ended with a freeze of the camera after a couple of minutes – the only way to recover the camera in that situation is to remove the battery temporarily.
After I also tried different memory cards and updated the firmware multiple times including doing a hardware reset, it was clear that this device has a defect. The support of GoPro offered a replacement under warranty when I send a copy of my purchase receipt. I will see if the replacement will work better – but according to the reports on the net, freezes seem not to be that uncommon for the GoPro Hero 3: https://www.google.de/search?q=gopro+hero+3+freeze.