(1) [512GB] Up to 880MB/s read speeds. Up to 650MB/s write speeds. 220MB/s minimum sustained write speed. Based on internal testing; performance may be lower depending upon host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes. (2) Based on internal testing with the SanDisk PRO-READER SD Express Dual Card against the 64GB-128GB SanDisk Extreme PRO UHS-II SD cards with SanDisk Extreme PRO SD UHS-II Card USB-C Reader/Writer. (3) Based on internal testing with the SanDisk PRO-READER SD Express Dual Card against the 1TB-2TB SanDisk Portable SSD. (4) Compatible device required. Full HD (1920 x 1080), 4K (4096x2160), 4K UHD (3840x2160) and 5.3K (5312x2988) video support may vary based upon host device, file attributes and other factors. See official SanDisk website for details. (5) Card only. See product packaging or official SanDisk website for additional information and limitations. (6) Registration required. Terms and conditions apply. (8) Based on internal testing with the SanDisk PRO-READER SD Express Dual Card against the 256GB SanDisk Ultra Lite UHS-I microSDXC card. Performance may be lower depending upon host device, interface, usage conditions and other factors. (9) Based on internal testing with the SanDisk PRO-READER SD Express Dual Card against the 128GB-256GB SanDisk Extreme PRO UHS-I microSDXC card with SanDisk Professional PRO-READER SD & microSD. Performance may be lower depending upon host device, interface, usage conditions and other factors. (10) See Western Digital White Paper- Flash 101 and Flash Management. A detailed overview of flash and flash management (August 2018). (11) See Flash Memory Summit, 2023 Flash Memory Timeline (2023). (12) Based on stated speeds. Based on internal testing; performance may be lower depending upon host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes. (13) 1GB=1,000,000,000 bytes. Actual user storage less. (14) Based on internal testing with 128GB-512GB SanDisk microSD express cards (sold separately); performance may be lower depending upon host device, usage conditions, and other factors. 1MB = 1,000,000 bytes.
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