To teach you how to choose a Removable storage device.

Close to the Lunar New Year, the author around a friend encountered such confusion: he hopes to buy a U disk home, special storage TV set in the TV, father mother free time to watch. He said he bought a 16G u disk, but the copy network TV to the U disk is found to be more than half an hour! Ask the author in the end Why, is not bought the slag u disk? If not the author personally encountered a careful questioning, I really do not believe that there are young people do not know USB2.0 and USB3.0 is what. I would like to take this opportunity to learn more about mobile storage--what kind of removable storage media do we need?

Although do not know what is USB 2.0 and 3.0 should not, but after all, not everyone like digital enthusiasts, any technology products technology can be the first time to understand (especially like the daily work is out to negotiate people), so the author first told everyone, USB 3.0 interface is blue, Just so everyone knows that a USB port with a blue logo is the product of the new age.

Do you know how important USB 3.0 is? The important point is that you purchase a USB 3.0 interface of mobile storage devices, when connected to a USB 3.0 computer, you can get several times the speed of USB2.0. As shown below, take a flash of OTG 64G u disk, the same file USB 2.0 interface to write only 16.9MBps, but to the USB 3.0 interface has 49.8MBPS, can speed gap how obvious. If you don't have time to think about how long it's okay to copy a file, then when I say nothing at all.

Transmission speed of USB 2.0 interface

However, buy a USB 3.0 interface of the U disk is not able to enjoy. You also need to make sure your computer is aware of the USB 3.0 Blue interface, which can be used to achieve a considerable speed. Like my friend's classic machine, fortunately not the first generation of USB interface, or copy network TV series estimated for several hours. Here I would also like to remind you that the original Windows 7 system does not support USB 3.0, you must install the driver. Windows 8/8.1/10 can be natively supported.

Transmission speed of USB 3.0 interface

Many friends may think, their usual number of digital products, a variety of interface cards or USB port inconsistencies if you want to buy SD card, but also buy micro SD card, but also to buy daily use of u disk, how tired ah. Then I recommend a relatively easy way, that is the combination method. It means to use a layer in a large package and a small way. For example, my ordinary digital camera is micro SD card, then buy a quick enough, and then with the SD card sets, and then with a USB card reader, so that a volume of things can serve three kinds of uses, mother no longer worry about me to lose one of them.

But also note that if your SD card and micro SD card are high-speed cards, do not let the card reader become a bottleneck. This card reader in the writer's hand is a product of the previous generation, used for several years, in fact, is seriously restricting the speed of the SD card, but the use of the general use of the storage of the file size is not large, through the ancient reader copied to the peak of the computer is also up to 20MBps (I hope it is broken and then replaced). So I suggest that you buy the card reader at least to support USB 3.0.

Basically now the general purchase of mobile storage devices (aside from the mobile SSD does not say), as long as the device to support USB 3.0 basically in accordance with the high price trend is the speed of the more excellent indicators, the main control from the low-end to high-end go. So at the time of purchase, the same capacity and the same support for USB 3.0 of the two U disk, we will be based on their own needs to buy the price is suitable, after all, all goods are in line with a penny a penny of the truth. Another problem is that some students ask about the volume of mobile SSD and speed U disk in small and miscellaneous file transmission when there is a gap? Here the author again with everyone popular science popularization.

A few years ago we were still using the mechanical hard disk (HDD) because it is a mechanical movement of the way to store work, and high-speed U disk and SSD is the electronic memory, photoelectric speed over the speed of mechanical movement, so the speed comparison between them is difference. And now, in the SSD and high-speed disk between the comparison, why high-speed u disk write a large number of small files (a few KB or dozens of KB) will be slower than the SSD many many times? The reason is that u disk volume, heat or particles and other factors caused its write delay is very high. But SSD although the volume is slightly big, but it has the entity memory to do the cache, the channel enough grain is good, natural it in a large number of writing small files when the speed is much stronger. If it is too complicated, you can also understand that the U disk using a single core single-threaded way to do transmission, SSD analogy is multi-core multithreading.

So, in fact, I want to show that the U disk is only convenient for everyone with the advantage of portability, strong enough in the continuous reading and writing, even as SSD, very suitable for similar to dozens of GB of TV series data replication. But if you are usually more accustomed to backing up your computer's fragmented documents, a portable SSD is your best choice. Both are useful, each has its own advantages.

As for you, it is not a problem to use a normal mobile hard drive for the time being, considering the economic reasons. In short, we encounter the use of mobile storage devices in general the question and use of the proposal the author is basically popular science, if you are foolishly by the store JS slaughtered, it really no Yan.