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Comparison SanDisk Ultra 80MB/s microSDXC 320x UHS-I 128 GB vs SmartBuy microSD Class 10 128 GB

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SanDisk Ultra 80MB/s microSDXC 320x UHS-I 128 GB
SmartBuy microSD Class 10 128 GB
SanDisk Ultra 80MB/s microSDXC 320x UHS-I 128 GBSmartBuy microSD Class 10 128 GB
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TypemicroSDmicroSD
Storage128 GB128 GB
Specs
Speed class1010
UHS classUHS-I Class 1 (U1)UHS-I Class 1 (U1)
Video recording classV10V10
Read speed80 MB/s80 MB/s
Write speed10 MB/s20 MB/s
Adapter included
 /depending on configuration/
 /depending on configuration/
Added to E-Catalogaugust 2018march 2016

Write speed

The maximum speed for writing data to a memory card.

High write speed is important for tasks that involve storing large amounts of data in a limited amount of time. However, note that this paragraph indicates the theoretical maximum speed for perfect conditions; in fact, this value can be noticeably lower. Therefore, the characteristics of memory cards also indicate the minimum guaranteed write speeds in different modes — the general speed class, the UHS class, the video recording class and/or the class for applications. All of them are described in more detail above. However, you can also evaluate the capabilities of the carrier by the overall speed: other things being equal, a card with a higher theoretical speed will work faster in fact.

As for specific values, speeds from 4 MB / s and from 6 MB / s are practically not found nowadays, from 10 MB / s and from 16 MB / s can be called average indicators, from 50 MB / s — above average, and the fastest models have a maximum write speed of 100 Mbps or more.
SanDisk Ultra 80MB/s microSDXC 320x UHS-I often compared
SmartBuy microSD Class 10 often compared