The SD Association, a group that sets the standard for memory cards, today is releasing a new SD 8.0 specification for SD Express memory cards that will allow the cards to transfer data at a rate of almost 4 gigabytes per second. It uses the PCIe 4.0 and NVMe interfaces commonly used in solid state drives. New technologies such as 8K video generate much larger files, so if you want to send data in a timely manner, it will require faster throughput, so the transfer speed will be faster. According to the SD Association white paper, the 8.0 specification in particular allows for transfer rates up to 3,938 MB per second. This is a significant increase from the transfer speed of up to 985 MB per second, as seen on cards built into the SD 7.0 and SD7.1 specifications using the slow PCIe 3.1 interface. The new specification will be available on SDHC, SDXC and SDUC memory cards, the SD Association said theoretically it can be used theoretically on the 128TB SDUC card, the largest amount of memory currently supported by SD cards.  Although this specification was released today, that doesn't mean you can visit Best Buy and choose a new card with SD 8.0 specification. You have to wait for the memory card manufacturer to actually implement the specification in future products. It also requires a time-consuming process to support the card-reading specification on the hardware side, such as laptops, cameras, and card readers.