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Anonymous users2024-02-06Hard disk than USB flash drive.
The speed is much faster, so it is very fast for the U disk to copy files to the hard disk, and the U disk only reads; On the other hand, the write speed of the USB flash drive is not as fast as the hard disk, which causes the hard disk to copy files to the USB flash drive much slower, and the speed keeps jumping because the file is slower than a large file if it is fragmented.
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Anonymous users2024-02-05The quality of the SanDisk USB flash drive is still very good.
1. There are many models of Sandisk's USB flash drive, what are you buying? Is it **?
According to what you described, it should be an ordinary USB flash drive of Sandisk. Licensed SanDisk USB flash drives are all anti-counterfeiting, please pay attention to verification.
2. What software do you use for testing?
It is best to use special software, such as atto disk benchmark, to test the USB flash drive. If you use Windows Vista's built-in copy speed display, it will be affected by the file type. (See Question 3).
3. Is the file you copying a single large file or a large number of small fragmented files?
If you copy a single large file, the write speed can reach 7M. If you copy a mixed set of fragmented files, the write speed of the USB flash drive will drop significantly, which is unavoidable for any USB flash drive.
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Anonymous users2024-02-04Almost all USB flash drives, including hard disks, have a much faster read speed than a write speed, which is normal. The specific mechanism involved is more verbose, I guess you don't have the heart to listen, in short, if your disk is below 1m yuan, there is absolutely no problem.
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Anonymous users2024-02-03For example, if you copy a 2G file, the speed starts at 50m s, lasts for a while (a few seconds), and the speed immediately drops to 0, and after a while, the speed suddenly goes up again, and so on and so forth.
This is how the problem can be solved.
The principle of solving the problem is to first understand the impact on the replication speed, and then find a solution.
There are many reasons that affect the speed of copying large files, and the main reasons are:
1. The performance of the computer, which is related to the hardware. Since it is not possible to change, it is not analyzed.
2. The current performance and environment of the system. To put it simply, this is the main reason that affects the speed of copying large files. Divided into: Out of memory. For example, you are running a very program, open a lot of windows, copy while watching, copy while listening, and so on.
Solution: Close all unused windows, leaving only the duplicate window. If the memory is too small, such as only 4 GB, turn off the antivirus tool.
3. Copy too many files at the same time. Copying large files is done one by one, although the number of operations is a little more, but the speed will be much faster.
4. To copy the hard disk to the U disk, you need to select the interface and disk. Try not to use interface disks.
5. Do not do other operations in the process of copying large files.
All of the above can ensure that large file replication and speed are smooth and high-speed.
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Anonymous users2024-02-02Windows systems have cache settings for each drive. The larger the setting, the longer the previous copy will be faster, and the larger the size of the copy. When the information in the cache is written, it is the normal write speed of the USB flash drive.
The file is very small, and the copy speed is very fast, and the file is very large, and it feels that the speed is getting slower and slower. Generally, it can reach 10-20m seconds at the beginning, and about 4-7m after stabilization. Good brands will be a little faster, but not a lot.
But the worse brands are not good. Don't just look at or, there are still gaps between different brands.
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Anonymous users2024-02-01The USB flash drive that is read directly without a cache may fluctuate high and low, which is generally not the case with a cache and a master controller. If the mobile hard disk is a mechanical disk, when encountering a large number of read fragmented files, the reading curve will also be seriously reduced due to frequent seek point reads.
In fact, this conclusion should be incorrect, or depending on the specific problem, let's analyze it for you: Because the U disk manufacturer is calculated according to the conversion unit of 1g=1000m, and the computer is calculated according to 1g=1024m, so the actual capacity of the U disk with a nominal 8G capacity on the market is only 8*1000=8000M, not 8*1024=8192M as we understand it. In this 8000m capacity, divide 8000m by 1024m g (computer) =, and then deduct some system files to occupy the space that may be left, so the 8g**u disk you bought, the capacity displayed on the computer is not 8g, generally floating left and right. >>>More
The fastest is Bodi's rage, which may exceed 27MB s when written to the actual test! Dual-core, bull x! >>>More
Summary. Precautions for the use of U disk: 1. The U disk generally has a write protection switch, but it should be switched before the U disk is inserted into the computer interface, and should not be switched in the working state of the U disk. >>>More
How can I take a 4G file in about 5 minutes?
Samsung fake U disk test 400 trillion things use more than 5 points. >>>More
After the U disk is mass-produced, you can't install the system like the optical drive, you can only enter the PE, and restore the image in the U disk to the computer in the PE. However, the successful mass production should have a boot function, you need to set the first boot from the BIOS to removable (removable device) to boot. If it can't be started, it may be that mass production is not successful! >>>More