British firm Integral has become the new king of smartphone storage, releasing the world's biggest microSD card with a total storage capacity of 512GB.

The new card surpasses the previous record holder SanDisk, which claimed the title with a 400GB model back in August last year. Sandisk's 400GB card is still faster than Integral's higher-capacity unit, however, with a maximum data transfer speed of 100MB/sec compared to Integral's 80MB/sec maximum.

"Consumers have been clear in their call for increased storage, as mobile devices have become essential to many in everyday life," said James Danton, marketing manager for Integral.

"The need to provide extended memory for smartphones, tablets and a growing range of other mobile devices such as action cams and drones has been answered. As a company, we are very proud to be the first to achieve the 512GB capacity milestone in microSDXC, worldwide".

The release marks a watershed moment in mobile storage, as users are now able to outfit their smartphones with a storage capacity equal to (if not greater than) most laptop SSDs. The new card also meets the V10 video speed class standard, meaning that it's capable of recording and playing back 4K video with no issues.