No problem for shooting with the Panasonic GH4, either 4K or Full HD 200Mbits, map the writing largely cash broadband. Price largely cheaper than Scandisk for an equally convincing result. I wish nevertheless to emphasize another card Transcend SDHC Class 10 UHS-1 600x does not flinch with large flow (; psc = 1). So it is not necessary to use a card as fast as Transcend SDXC UHS-3 to shoot in high speed with the Panasonic GH4, but at that price, it would be wrong to deny it. No surprise =)