Huawei is pushing for a new memory card standard Ė NM Ė but is it any good? Benchmarks show that the cards perform on par with their microSD counterparts. They use the eMMC 4.5 protocol with an UHS-I U3 speed rating, promising peak read speeds of 90MB/s and sustained write speeds of 30MB/s.
Thatís theoretical, hereís what you can expect in practice based on the numbers by Hi-Tech:
|Maximum||74 MB/s||83 MB/s|
|Average||70 MB/s||73 MB/s|
Copying a 6.7GB file took 1 minute 33 seconds, thatís 72MB/s. Note that a 128GB NM card was tested (user-available capacity is 123.73GB after formatting). Currently thatís the only capacity available, but 256GB and 64GB models are coming (all manufactured by Toshiba for now).
Only four phones support the standard, the four Mate 20 models, though there are probably more on the way. Thereís a USB adapter if you want to browse one of these cards on your computer, but they are not nearly as ubiquitous as SD readers.
Source (in Russian)
The best with this freaky format is that it works on every toaster as a leveler think Huawei already thinking on different thinnesses
Nano Memory card and Nano-sim just a little smaller, while the funky multiple cameras setup already use up a lot of space.