Purchased on Amazon. I bought this for a ZR camera, but I only used it for shooting (recording) twice before selling the camera, so I no longer need it. The SD card has only been written to twice, so it's in like-new condition. ProGrade Digital microSDXC UHS-II V60 GOLD 512GB, Prograde Digital, Genuine Product Maximum Transfer Speed: Read 250MB/s, Write 130MB/s Speed Class: V60, U3, C10 - Brand: PROGRADE - Capacity: 512GB - Speed Class: V60 - Maximum Transfer Speed: 250MB/s - Type: microSDXC - Adapter: SD adapter included Thank you for looking.