If you've ever tried to launch apps from an SD card, you already know that "Class 10" or "UHS-1" ratings tell you little about how that'll actually work out. To help avoid this conundrum, the SD Association created the new Application Performance Class A1 standard, meant to let consumers know how the card will behave when running Spotify off it. Just four months after the standard was finalized, Toshiba let the world know that its Exceria Pro M402 line of SD and MicroSD cards already meet the requirements for the A1 standard.
Those requirements are pretty light, but for an SD card they're actually relatively strict. The device must be able to sustain 1500 IOPS in 4K random read operations, 500 IOPS in random writes, and 10MB/sec in sequential operations. Toshiba says all of its qualified SD cards will be labeled as A1 going forward, alongside the existing U3 (UHS-III) speed class labeling.
Toshiba already uses the Exceria and Exceria Pro name for many types of flash media, so if you're looking for these cards, be sure to find the "M402" designation or the "A1" logo. The A1-branded cards will come in 16GB, 32GB, 64GB, and 128GB capacities, and they'll carry a five-year warranty. Toshiba says they'll be available in the second quarter of 2017.