Longsys has announced the world's largest A2 microSD card under the Lexar brand name.

The impending 512GB Lexar High-Performance 633x microSDXC UHS-I card meets the Application Performance Class 2 (A2) requirements, meaning it has a minimum write speed of 2000 input/output operations per second (IOPS) and a minimum read speed of 4000 IOPS. In the case of this particular Class 10 card with a V30 rating, that means it can read up to 100MB per second and write up to 70MB per second.

This particular card is designed more for smartphones and tablets, but can also be used in various action cameras and drones that use microSD cards for storage. Based on the speed, this particular card should handle 4K/30 video and 1080p/120 video without any hassle.

Lexar says the card has been tested in the "Lexar Quality Labs with more than 1,100 digital devices, to ensure performance, quality, compatibility, and reliability." It claims an operating temperature range of 0°C/32°F to 70°C/158°F, storage temperature range of -25°C/-13°F to 85°C/185°F, and a humidity range of 5-95 percent.

Lexar said the card is expected to hit shelves by the end of October for an MSRP of $299.99, and has the card up on its website, but the 512GB version isn't yet available from any retailers.