The most popular three flagship mobile phones, the Samsung S9, Apple iphone X and Huawei P20 Pro, all take more or less high-definition pictures. The 960p slow-motion photography is one of the selling points. These selling points are indeed enough to arouse consumers' buying power.
However, in addition to Huawei's Mate X's dauntingly large storage space, when people use other mobile phones to take photos and video games are enjoying themselves, the storage capacity of the mobile phone may be full, which is a very embarrassing thing. Fortunately we can purchase micro SD to expand the capacity of our mobile phone.
The Micro SD card is a very small flash memory card. The SD card is a new generation of memory devices based on semiconductor flash memory. Due to its small size, fast data transfer, and hot swappability, the SD card is Is widely used in portable devices such as digital cameras, mobile phones.
Today, the evaluation is from the Toshiba M303 128GB high-speed memory card.
As we all know, today's increasingly popular mobile phone 960p slow-motion shooting requires more and more memory card write speed, low-speed write SD card is obviously unable to meet the needs of this era of image production. And this Toshiba's M303 high-speed storage The card supports 4K shooting, so next we will look at how strong this product is.
Appearance
This time we got the 128GB version, in addition to the product there are 64/256GB three specifications. Product packaging is the traditional Toshiba red color as the main body, some of the important data marked above.
For example, the maximum read speed reaches 98MB/s, and the maximum write speed reaches 65MB/s. Compared with the previous-generation ultra-quick speed M302, the read speed of the M303 has improved, but the write speed has increased by 2.8 times. Compared to the extremely low speed M302 starting price only expensive 30, 309 yuan.
The product can withstand the temperature of -25°C-85°C in terms of protection, to meet the requirements of X-ray resistance, IPX7 standard waterproof and 5 meters drop resistance.
The product also has an A1 application performance level that can be used to quickly run and launch APP applications like built-in storage. A1 is a new system standard released by the SD Card Association in November 2016 - A1 (APP Performance A1).
To obtain App Performance Class 1 (abbreviation A1), the expansion card must meet these requirements: 1500 random read IOPS, 500 random writes IOPS 10MB/s sequential write performance Previous C, U, V SD card standards There is no provision for random read-write IOPS for memory cards.
This time, because the running program may require the reading and writing of a large number of small files, it was stipulated that the expansion card conforming to the A1 standard could well support the Android's Adoptable Storage function and could smoothly run the application.
The product also has the V30 certification standard. What does this mean? With the recent introduction of 6K/8K video specifications and the possibility of future VR applications, the new SD5.0 standard adds a new Video Speed Class standard. .
It extends the speed standard and divides the card speed into five levels: V6/V10/V30/V60/V90, corresponding to the minimum writing speeds of 6MB/s, 10MB/s, 30MB/s, 60MB/s, and 90MB/s, respectively.
Let's perform a high-speed read/write test on the memory card to see if it is as powerful as it claims to be.
Performance Testing
We use first AS SSD Benchmark Continuous read and write tests were performed on the memory card. During the test, the maximum read speed of the product was 93.27MB/s, and the maximum write speed was 65.47MB/s. The read/write speed was almost the same as the declared maximum read/write speed. It seems that this product does perform well. Powerful.
ATTO Disk Benchmark is an easy-to-use disk transfer rate detection software that can be used to detect the read and write rates of hard disks, USB flash drives, memory cards and other removable disks.
It can monitor the reading and writing speed of storage devices for various sizes of files. For example, a 4KB score is the speed of reading and writing many 4KB files, and a total of 256MB size folders. The more fragmented files in theory, the more fragmented, the storage device reads. The slower the write speed.
From the test results, we can see that when the file size is 64KB, the write speed of the memory card has reached the peak of approximately 70MB/s. When the file size is 512KB, the read speed of the memory card reaches approximately 95MB/s. The numerical value.
In contrast, we put the test score of Toshiba's extremely fast M302 microSD (32G), and we can intuitively see the latest Toshiba's THN-M303 dumping the previous generation product at three speeds.
to sum up
In the evaluation, we can see that this product does have a good literacy, with not a high price, and it is indeed a gospel for consumers who have extended cell phone storage needs.
