Sandisk SanDisk 64GB Extreme PRO SD Card - 200mb/S V30 UHS-I - Black

Capacity: 64 gb type / form factor: sdxc (secure digital extended capacity) speed class: uhs-i / u3 / v30 / class 10 max read speed: ~ 170-200 mb/s (varies by variant/model) max write speed: up to ~ 90 mb/s (burst / peak) minimum write speed (for video/sustained needs): at least 30 mb/s (because of v30 rating) operating temperature range: approximately -25 °c to 85 °c non-operating / storage temperature: down to around -40 °c up to about 85 °c built-in write-protect switch: yes