The A1 symbol on Micro-SD cards tell you if it is fast enough for apps
The SD Association recently introduced new application performance classes that will specify Micro-SD cards that are fast enough to be used for starting apps and programs. So far only one class, named A1 has been announced
With the introduction of the new SD card specification 5.1, the SD Association also announced new performance classes that are supposed to tell customers if a card is fast enough to run apps. So far only one level has been introduced, the A1 class. For a card to reach that level, it has to meet or exceed the following minimum requirements:
Random Read Input-Output access Per Second (IOPS) of 1500
Write IOPS of 500
Sustained Sequential performance of 10MB/s.
Not only Android Smartphones can take advantage of Micro-SD cards for starting and running apps. The tiny cards are also popular in Windows tablets, convertibles and notebooks to expand onboard storage. Future SD cards carrying the A1 symbol will easily be recognized as being fast enough for that task. That, however, does not mean that current cards without that symbol are not able to meet or exceed the above mentioned minimum requirements.
Alexander Fagot - Managing Editor News - 9362 articles published on Notebookcheck since 2016
As a young tech enthusiast with a history involving assembling and overclocking projects, I ended up working as a projectionist with good old 35-mm films before I entered the computer world at a professional level. I assisted customers at an Austrian IT service provider called Iphos IT Solutions for seven years, working as a Windows client and server administrator as well as a project manager. As a freelancer who travels a lot, I have been able to write for Notebookcheck from all corners of the world since 2016. My articles cover brand-new mobile technologies in smartphones, laptops, and gadgets of all kinds.