SanDisk 256GB Extreme PRO UHS-I SDXC Memory SDSDXXD-256G-ANCIN
Amazon.com: SanDisk 256GB Extreme PRO SDXC UHS-I Memory Card - Up to 200MB/s with SanDisk Professional PRO-Reader SD and microSD - High Performance Card Reader
SanDisk Extreme PRO SD Card Review - StorageReview.com