I've got a Class 10 Samsung MicroSD storage card bought from Amazon.UK in my Note for storing and for viewing my recorded TV. It was recorded from my Window Vista laptop, copied to Note via USB cable and viewing using the pre-installed MX Player. After I watched the video I will delete most of them for space for other videos. There are also some videos that I kept permanently. During the first few weeks, everything was perfect. But now it keeps on crashing intermittently, even on my permanent videos. When I restart the recorded video, it will crash at a different place, sometimes it crashes after playing for only a few minutes or sometimes longer. Is that a storage card problem? MX Player App problem? Incompatibility between Samsung phone and Samsung storage? a dud card?

It is not the end of the world but it is just a nuisance spoiling the enjoyment of watching video. Help !!!!