I remember reading and then picking up, commercially available 10 U disk chaos
By chance, the landlord had a large number of U-disks on his hands. When he was idle, he wanted to run a minute to see. In fact, the U-disks in his hands were far more than these, but considering that some models had been discontinued and sold, they ended up being only Picking out the 10 models that are still on sale is a big fight. At present, U disk prices are as high as memory SSDs, and you may want to buy U disk worthy friends in the near future. However, the first thing to note here is that the test data is for reference only because there may be differences in the test platform and test methods.
Sony Exquisite Series USB 3.0 U Disk
Sony (SONY) USM16X/P Exquisite Series 3.0 High Speed ​​U Disk Independent Dust Cover Design USB Flash Drive 16GB Pink 52.9 Yuan Jingdong Direct Link This U disk is an exquisite series of Dafa. The outer shell is made of plastic material. One side is high-gloss injection molding, and the other side is frosted process. The protection cover uses anti-lost design with a lanyard slot. U disk size can refer to the next AA battery.
Dafa This U disk write speed is normal, but the reading speed is still good, more than the official nominal value, and then add Dafa brand beliefs and lively colors, whether it is to send girls or female users for personal use I feel very appropriate .
There is also a color I like, Yan value control do not miss.
Sony (SONY) USM16X/L Exquisite Series 3.0 High-Speed ​​U Disk Independent Dust Cover Design USB Flash Drive 16GB Blue 52.9 Yuan Jingdong Direct Link This is one of the two USB 2.0 USB sticks in this article. Toshiba Flash USB 2.0 has been sold for a long time and the sales volume is also very high. Currently, USB 3.0 is also available.
Toshiba (TOSHIBA) series (THUHYBS-016G) U disk 16G39.9 yuan Jingdong direct link Use the anti-lost protection cover design as the previous Dafa model, also with a lanyard slot. The U disk has internal read and write operation indicators.
After all, it is a USB disk with USB 2.0 interface, and the speed is not beautiful.
If you like this look, it is recommended to choose the USB 3.0 version that is almost the same price.
Toshiba (TOSHIBA) flash series USB 3.0 U disk 16G white 39.9 yuan is not a high-speed but very stable Jingdong direct link View Encyclopedia The biggest feature of this U disk is that it has a label groove design and comes with a label sheet. Protective cover is not designed to prevent loss.
Toshiba (TOSHIBA) Flash Series U disk 16G Blue USB3.036.9 yuan Jingdong direct link 
The speed is not dazzling, but after all it is a relatively cheap one, and the price is even lower than some USB 2.0 ports.
There are many models of Kingston's U disk, the name is not easy to remember, but the appearance is rather familiar. This DTSE9 G2 is an upgraded version of the DTSE9, upgraded to a USB 3.0 interface.
Kingston 32GB USB Flash Drive USB3.0 DTSE9G2 Metal Silver Bright Reading Speed ​​100MB/s119 Yuan Jingdong direct link The same as the previous generation DTSE9 uses a full metal shell, but the appearance of more lines.
The read and write speeds are quite satisfactory in the USB 3.0 U disk, and the actual reading speed is slightly higher than the official nominal value.
Although the metal shell, but different colors to distinguish the different capacity is this U disk characteristics.
Kingston DTM30 32GB USB3.0 Exquisite Hyun Thin Metal U disk 99 yuan Jingdong direct link The first half is metal, the latter half is plastic, and the color value is compared to the previous full metal case. I personally prefer this one and the price is a little cheaper.
From the test results, the performance level of this U disk is almost the same as that of the DTSE9 G2 with a full metal shell. It seems that the difference between them is just that the shell is different.
This is a hotter version of Jingdong U disk sales, with a nominal reading speed of 150MB/sec.
SanDisk (CZ73) USB3.0 Metal U disk 32GB Read 150MB/sec 79.9 yuan Jingdong direct link U disk using metal + plastic structure, head and the first two U disk without cover quite.
The reading and writing speed is good, especially the writing speed is bright, and it is considered to be the best in the same capacity U disk which is close to the price. The price is good.
In this article, another USB 2.0 USB flash drive is designed with a full metal casing.
Taipower (Teclast) U disk U disk 32G metal waterproof 69.9 yuan Jingdong direct link 
The speed is not fast, and now USB 2.0 USB flash drives may only have a price advantage.
The appearance is exactly the same as the 32G in the front, but different colors are used to distinguish the capacity, and 64G is a calm black.
Kingston DTM30 64GB USB3.0 Exquisite Hyun Thin Metal U disk 189 yuan Jingdong direct link 
Read and write speeds are close to those of the 32G version tested earlier.
This is the second largest U disk in this article. It has an all-metal coverless design. The tail rings use different colors to distinguish the capacity. It can also be used as a lanyard slot. U disk uses USB 3.1 (Gen1) interface.
Kingston USB3.1 128GB metal U disk DT50 black 299 yuan Jingdong direct link 
Read and write speeds are higher than the three small U-disks in front of Kingston, especially the write speed is greatly improved, but in terms of form factor it needs to be compromised.
This is a performance-oriented U disk, using MLC particles, nominal speed up to 350MB/sec, and prices are more eye-popping.
Kingston HXS3/128GB reads up to 350MB/s 128GB USB3.1 HyperX Savage U disk 699 yuan Jingdong direct link Red and black color U disk to take in the hand quite a component, the black part of the surface is a rubber coating, the red metal part in addition to the shape of this groove design is also convenient to hold. The protective cover can be stuck behind the U disk, and the translucent design will not obstruct the reading and writing of the indicator light.
The U disk that reads and writes the highest speed in this article, and the high-speed cost is Money Money Money.
In fact, I have been tangled or not to add this article in a U disk evaluation article, well, it is good to play soy sauce.
Samsung (SAMSUNG) T3 Series 250G Mobile Solid State Drive (MU-PT250B/CN) 899 yuan Portable SSD Jingdong direct link View Encyclopedia The SSD itself is relatively small, but the portability of the SSD is greatly reduced.
Compared to U disk, the larger volume in exchange for absolute performance, of course, the price is not cheap is it.
All the products that appear in this article are on sale models, and the sales of some models are still quite high. This article aims to make everyone understand the current U disk performance and provide reference for them. If you feel that Help remember to play Oh, haha. Well, this is the first time to come here.
UV filter, also known as ultraviolet filter, refers to a filter used in digital cameras, which plays a role in protecting the lens and improving the picture quality. UV mirrors are usually colorless and transparent. Some will appear purple or purplish red at a specific angle due to the addition of antireflective film.
UV lens is usually used to protect the delicate lens coating. In fact, this is only one of its auxiliary functions. UV mirrors can reduce the blue tone caused by ultraviolet light. At the same time, for digital cameras, it can also eliminate the interference of ultraviolet rays on CCD, which helps to improve the clarity and color effect. However, due to the popularity of CMOS, the sensitivity to ultraviolet light is greatly reduced, so the role of UV mirror is becoming smaller and smaller. UV mirror with average quality may sometimes play a negative role
The main function of UV mirror is to absorb ultraviolet light with wavelength below 400 nm, and has no filtering effect on other visible / invisible light. It can filter ultraviolet rays because the lens contains lead, so the UV lens is heavier than other lenses of the same size and thickness. At the same time, the UV mirror can avoid the direct contact between the lens surface coating and the external environment, which plays a protective role.
UV mirror is suitable for shooting in the environment of seaside, mountain, snow field and open area, and can weaken the blue tone caused by ultraviolet light. At the same time, for digital cameras, it can also eliminate the interference of ultraviolet rays on CCD, which is helpful to improve the clarity and color restoration effect
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