A1 Application Performance Class is a newly defined standard from the SD Specification 5.1 and 6.0 which not only define sequential Reading Speeds but also mandates a minimum IOPS for reading and writing. Class A1 requires a minimum of 1500 reading and 500 writing operations per second.
The A1 supports the Adoptable Storage feature on Android phones running Android 6.0 Marshmallow and above version. It will convert your microSD as a part of your internal phone memory.
Adoptable storage formats your microSD card as a part of the system using the Ext4 file system and 128-bit AES encryption. This new partition becomes part of the system and the primary storage location for app data. Where before you might only have had 10-12GB of storage available on a “16GB” phone, you could have around 70GB if you adopt a 64GB microSD card. Data will be distributed to the card and internal storage automatically.
The A1 spec allows the new card to manage random read input-output access per second (IOPS) of 1,500 and write IOPS of 500, so it can quickly open apps and process accompanying tasks, such as audio, graphics, saved profiles and in-app permissions. With this in mind, the new SanDisk Ultra microSD card with A1 is designed to provide consumers a faster, more powerful app experience using cards.
SHOOT, SAVE, AND SHARE MORE THAN EVER BEFORE
Capture life at its fullest with the breakthrough capacity of of up to 256GB. Rated A1 for faster app performance to launch and load apps faster than ever before.
PREMIUM TRANSFER SPEEDS
Your content moves blazingly fast. Now you can transfer up to 1200 photos in just one minute. With speeds of up to 120MB/s.
DURABLE DESIGN FOR USE IN HARSH ENVIRONMENTS
SanDisk Ultra microSD UHS-I Cards are shockproof, temperature-proof, waterproof, and X-ray-proof so you can enjoy your adventures without worrying about the durability of your memory card.
NO MORE WORRYING ABOUT WHAT TO KEEP AND WHAT TO DELETE
Shoot photos and Full HD video continuously without having to worry about running out of space.
The SanDisk Ultra microSDHC/XC UHS-I Card is backed by a 10-year warranty.