We bought a 16GB & a 32GB for our HD Canon camera. The 32GB worked just fine. Unfortunately, we just tried to use the 16GB card and nothing stuck! The camera did some initial video and photos but when my husband played them back they just disappeared from the card! First the video was gone and then the photos. He tried initializing, no luck and then we tried to download the photos with our card reader, again nothing. The lesson here is be sure to check your cards soon after you receive them so that you can return them if they don't work. We're stuck with a faulty card that we can no longer return. Get more detail about Transcend 8 GB SDHC Class 6 Flash Memory Card with Card Reader TS8GSDHC6-S5W.