Lexar just announced “the world’s largest A2 microSD card”. No, it’s still a 512GB card, but what sets it apart from the previous cards with this capacity is the A2 rating. It stands for Application Performance Class 2.
This card is optimized for moving apps and games out of the phone’s internal storage and onto the card. In such cases the Input/Output Operations per Second (IOPS) matter much more than sequential reads and writes.
The A2 rating guarantees 4000 IOPS for reads and 2000 IOPS for writes, up from 1500/500 for an A1 card.
But this new card from Lexar is good for video too. It can easily handle 4K video recording thanks to the V30 rating. It indicates that the card can handle 30MB/s sustained writes, which is equivalent to UHS-I U3. Note that the card peaks at 100MB/s, but can’t keep it up for long.
Lexar’s new 512GB A2 microSD card will sell for $300. It should be available right now, but we didn’t find it in any stores.
PS. Yes, the rating system on SD cards has gotten out of control and can be very tough to decipher.
Well thats correct but in past Samsung made a phone with a tiny HDD inside. Maybe in present era something as that is also possible. Having 4TB or even 20TB inside.
Well obviously a hard drive will be cheaper than a microsd card, it doesn't have to fit inside a phone