I bought two of these cards three months ago. One worked (and is working) well and the other appeared to for a couple of days. Then, without warning or any other indication, it is showing an error with my Canon HF200. I pulled the chip out of the camcorder and tried to read it on my PC with no luck. I then took it to Mike's to see if they could recover the video. The tech said his computer couldn't even recognize that the chip was there. He also said that they have heard of a great deal of complaints with this brand. Get more detail about Transcend 16 GB SDHC Class 6 Flash Memory Card TS16GSDHC6E [Amazon Frustration-Free Packaging].