So, now that slotted Android devices can store and run apps from removable cards, the SD Association has introduced a new specification to enable the best user experience – Application Speed Class 2 (A2). Samsung EVO Select microSD memory card Tech specs: Read speed: Up to 100MB/s | Write speed: 90 MB/s | SD Class:10 | Capacity: 128 GB, 256 GB For the time being, not really. However, this could change in the future if cameras turn out to expand into more app-heavy devices. If this happens then perhaps it will be more relevant to them someday. Capacity: If you do have a lot of photos and videos, a smaller microSD card will not be enough to store all your items, so you would want to look for a larger microSD card, like one with 128 GB or even 1 TB if you need it.

SanDisk MicroSD Card: What’s The Difference? A1 vs A2 SanDisk MicroSD Card: What’s The Difference?

From this diagram, and in reference to IOPS, it is clear to see that the A2 provides an extraordinary gain. The minimum read performance is up by 2.7x, at the same time as providing 4x faster minimum write speeds.Sandisk Extreme Pro microSDXC card Tech specs: Read speed: Up to 200MB/s | Write speed: 140 MB/s | SD Class: 3 | Capacity: 32 GB, 64 GB, 128 GB, 256 GB, 512 GB, 1 TB

SanDisk 512GB Extreme Micro SD (SDXC) Card U3 - MemoryCow SanDisk 512GB Extreme Micro SD (SDXC) Card U3 - MemoryCow

https://www.mymemory.co.uk/blog/wp-content/uploads/2018/09/CRP18_SanDisk_MicroSD_A2_Animation_4K-2.mp4 Application Speed Class 2, defines the minimum specification for cards and host devices. Sequential read and write speeds are now joined in importance by random read/write speeds (measured in IOPS). The higher the IOPS (Input/Output operations Per Second) the smaller files can be read and written to the card in any one time. So, for apps that open multiple small files – high scores, different graphics for a single level, licensing permissions, etc. – a minimum IOPS level is important, which is covered by the A2 spec. Speed: Most devices are compatible with a Class 10 or U1-rated card. However, if your device requires a lower speed class, shop for microSD cards that have a Class 2, 4, or 6 classification.Sandisk Extreme Plus 1TB microSDXC memory card Tech specs: Read speed:Up to 200MB/s | Write speed:90 MB/s | SD Class:10 | Capacity: 1 TB