I use for years SD card for data storage. This will always be re-recorded. After I had used in addition to other brands also some "duds" that corresponded neither the imprinted memory class were still reliable to use, I have shot me on Transcend. And have never been disappointed. OK, there are sometimes cheaper deals, but this label offers a consistently superior quality. Read / write speed and capacity correspond exactly to the imprint. Also SanDisc proved not to be so reliable. In addition to Panasonic's Transcend 1st choice for me. Also holds the acquired here 64GB card delivers what it promises. Smooth buy rating and earned 5 stars.