Is the larger capacity "far ahead" 512GB version of the NM memory card finally practical?

　　As a standardized product launched by the Intelligent Terminal Storage Association (ITMA), the NM card has become an ideal storage expansion medium for Huawei, Honor and other brand mobile phones, and its biggest feature is that it is miniaturized and matches the size and specifications of the Nano SIM card, so it can be loaded into the Nano SIM card slot adapted to the mobile phone, and it has become a powerful assistant for shooting and creation for some users who do not need dual SIM functions.

　　Previously, the maximum capacity of NM card was only 256GB, which was relatively limited for mobile phone expansion, and the larger capacity will improve the practicability of this type of storage product and stimulate the functional needs of users.

　　At the first time, we experienced Lexar's new 512GB version of the NM memory card, which can store up to 88,000 20-megapixel photos or 530 minutes of 4K resolution video, which brings excellent expansion value for this type of mobile phone with excellent image performance.

　　The outer packaging design of the Lexar NM memory card adopts the simple style design common to memory cards, including the classic shelf hanging holes in the upper part. It prints the product logo, capacity, main performance characteristics and other information on the front of the package, and embeds it in the transparent plastic packaging containing the memory card body, so that the whole is clear at a glance.

　　The surface of the NM card continues to use the black and white color separation style of Lexar professional storage products, and is printed with clear product information such as capacity and speed.

　　At the same time, we also received the NM memory card 2-in-1 USB 3.1 card reader launched by Lexar, the 2-in-1 card reader has dual slots for NM cards and MicroSD cards, as well as USB-A and USB-C dual port design, in addition to being a good partner for NM cards, it can also adapt to the needs of most users' MicroSD card reading and writing and device interfaces.

　　Entering the performance measurement link, the first is the theoretical test based on the PC storage speed test software, which is tested using CrystalDiskMark, AS SSD Benchmark and ATTO disk benchmark, and the results are as follows:

　　In the CrystalDiskMark test, the Lexar NM memory card achieved a sequential read speed of 94.35MB/s and a sequential write speed of 87.31MB/s, exceeding the nominal performance level of 90MB/s read and 85MB/s write.

　　In the AS SSD Benchmark, the measured sequential read and write speeds of the NM memory card reached 89.87MB/s and 83.00MB/s, which also performed well.

　　In the ATTO disk benchmark, the Lexar NM memory card has a wide range of "full blood" performance coverage, with a maximum of 90.14MB/s read and 83.39MB/s write.

　　At the beginning of the NM card standard, the goal was to achieve a write performance level no lower than SD V3, and from our actual experience, it undoubtedly far exceeds this basic standard, and can reach a performance level above V60, which is enough to meet the needs of high-quality video shooting in mobile phones.

　　So how does it perform in action on the phone? Let's experience it with the Mate X5 Collector's Edition on hand.

　　First of all, the imaging function, we can choose to save the captured pictures and videos to the memory card first in the camera settings of the phone, and then perform high-quality image and video shooting tests. However, in the phone's settings, high-speed burst shooting only saves photos to the built-in storage, so we opted to shoot high-quality, uncompressed 4K60FPS video for the experience.

　　The video information displayed by the software can be seen that the Mate X5 Collector's Edition shoots 4K60FPS video, the average bit rate reaches about 30000kbps, and the video size of only 2 minutes and 9 seconds has reached 475MB, which tests the write performance of the memory card, and the Lexar NM memory card can be said to meet the requirements perfectly.

　　We can also use the backup and restore in the phone settings to use the external memory card as a backup space for important files and application data, improving data security. For common business users of Huawei and Honor brands, this should be a feature with high practical value.

　　Finally, the content caching function of common video and music software, the Lexar NM memory card can easily do this job by simply setting the default cache directory to the memory card in the software.

　　brief summary

　　At present, most mobile phone products have bid farewell to external storage slots, and have also lost an option for convenient expansion, and the uniqueness of NM card is that with the help of Nano SIM, which still exists in large quantities, it brings more choices to this part of the user group.

　　With a smaller size, higher storage density, and appropriate performance, Lexar's new 512GB large-capacity version can be said to further enhance the practical value of this form of storage expansion, which is worthy of the user experience of Huawei and Honor mobile phones.