SD 5.1 - Sd Cards are now fast enough to run your Apps

Last year, Google released Android Marshmallow with a feature called 'Adoptable Storage' meaning you could use your sd card as a virtual internal memory and install apps on it. Theoretically, you could do so, but the performance was not up to the mark, due to slow read and write speeds provided by sd card. Hence, a number of major companies including Samsung decided not to use that feature.

Sd card association seems to address the issue with a new standard called Application Performance Class SD 5.1 . This new standard will be available for both- the sd cards and the phones. The new specification, called "A1" (or App Performance Level 1), comes with minimum random read performance inputs/outputs per second of 1500 IOPS, minimum random write performance of 500 IOPS and minimum sustained sequential performance of 10 MB/sec. In other words, they are good enough to be used as storage devices for Apps.

A1 logo will soon be found on devices and Sd card packaging, so that it is easier for the customer to know that they have to buy a card with A1 specification. Higher App Performance levels i.e. A2, A3 etc will also be introduced in the future.

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