Samsung has introduced product updates for its two lines of SDXC and microSDXC memory cards with UHS I interface, designed specifically for video and photography professionals. Because of this, Samsung promises greater read and write speeds for the Pro Plus and Evo Plus, as well as greater reliability and durability than standard memory cards.
The Pro Plus micoSDXC cards come in 128GB, 256GB and 512GB sizes, and the Pro Plus and SDXC cards come in additional 32GB and 64GB sizes - they&re even slightly faster than the Evo Plus models, which come in 64GB, 128GB, 256GB and 512GB (microSDXC) and 32GB, 64GB, 128GB and 256GB (SDXC) sizes, with maximum speeds of 130MB/s.
New Samsung SD cards
However, a prerequisite for these high speeds, which far exceed the maximum speed of the used UHS-I bus interface of 104 MB/s, is a suitable (micro)-SDCX reader that supports Samsung&s proprietary technology. Therefore, Samsung additionally offers the Pro Plus cards in a slightly more expensive variant, which includes such a USB adapter that can be used to reach the maximum speed of 160 MB/s.
Although there are significantly faster microSD/SDXC cards with a UHS-II interface, which can theoretically reach up to 312 MB/s, these are significantly more expensive than UHS-I cards like the newly introduced ones from Samsung, whose prices for the micoSD SDXC models are around 95 Euros (Pro Plus 512 GB), around 45 Euros (Pro Plus 256 GB) and around 23 Euros (Pro Plus 128 GB), respectively - the versions with a USB 3.0 adapter cost around 7 Euros more each.
However, not the maximum write speed is important for video recording, but the permanent write rate for error-free recording. This is at least 30 MB/s for sequential writing in Samsung&s Pro Plus series models according to the performance classes U3 and V30. Anyone considering buying a new SD memory card for recording video for their camera should find out from the manufacturer before buying what minimum guaranteed write rate the respective camera requires for the desired recording format.
New Samsung microSD cards.
Nearly: SD Express with up to 4 GB/s
. The speed bottleneck of UHS-I/II should be eliminated in the future by the new SD Express memory card standard, which will enable transfers of around 1 TB/s (according to SD 7.0 standard, using one PCIe 3.0 lane), around 2 TB/s (according to SD 8.0, one PCIe 4.0 or two PCIe 3.0 lanes) or around 4 TB/s (according to SD 8.0, two PCIe 4.0 lanes). However, only a maximum of 1 TB/s is defined for microSD Express. The UHS-III standard adopted in 2017 was supposed to deliver speeds of 624 MB/s, but SD memory cards equipped with it have never been launched on the market - the first SD Express cards, which will exceed UHS-III by far, are supposed to be released next year. more infos at bei www.samsung.com