How did my memory card start writing quite fast, and then it slowed down

Poisoned to cause it! Reinstall the system once and take a look!

The inconsistent read and write speeds of memory cards are due to the physical characteristics of the memory card itself.

When reading, it can be read in blocks without additional operations, and its time is mainly consumed in addressing and waiting for data stabilization, so the speed is fast.

When it comes to writing, there are two possible scenarios:

One is to rewrite only a part of a block, in which the entire data area used for the data to be written is read, and then the old and new data are merged, and then the data of a block is written to the block where it is located. And write operations will take longer.

In the other case, the entire block has to be changed, in which case the new data will be written directly to the block where it is located, which will be faster than the first case.

Therefore, the difference in operating principles leads to differences in read and write speeds.

For memory cards, class is usually used to indicate the write speed (the read speed varies less depending on the product), and the class level is calculated as a fixed write 8kb size file:

Class4 means that 8KB files are written to 4MB per second, and Class10 is 8KB files written to 10MB per second.

Two batches of files with the same total capacity but different file numbers will write faster for the smaller number of files, while the lower number of files will write much slower than the smaller number of files.

Cause: Lack of SSD is caused by the memory card itself cannot affect the storage speed.

1.Turn the tail of the computer upside down and unscrew the six screws.

3.Pull out the external force on the shell, remembering to be gentle and not to break it.

4.When you open the back cover, you can see the hard drive, memory, heatsink, and more.

5.Locate the mSATA interface as shown in the red box below.

6. When buying an SSD, you must remember to buy a tray (the correct thing is to know the disk), otherwise you will not install it.

7.Mounts the SSD onto the tray and then onto the mSATA connector of the laptop.

8. Finally, install the electric skull of the laptop, even if the work is completed, the output speed will be greatly improved regardless of the installation.

Reading does not change the data in the card, so it is much faster than writing. Writing is based on the speed of the data itself and the design of the card. Of course, there are other factors, such as the speed of the card reader is affected by the interface and cannot reach the maximum speed of the card design.

The difference is that one is taken out and the other is put in.

The write speed of the memory card is mainly determined by the chip of the memory card, which is a hardware problem. If you want to increase the transfer speed, you can only replace the memory card with a higher rate.

However, the memory card is connected to other devices for transmission, and it also depends on the type of connected device and interface, which also affects the transfer rate to a certain extent

Card readers, the compatibility of card readers of general well-known brands is very good, and the same memory card, if it is a copycat card reader, it will affect the transfer speed.

The computer interface, the same memory card and card reader, know the interface faster than the interface.

It has to do with cards. What card are you using? To tell the best to buy SDHC, SDXC, MicroSDHC. Large capacity and high speed. Uh, it's also more expensive.

The writing speed is slow, you can write each file separately, for example, you have 3 files to put into the memory card at the same time, then you put them one by one, I am sure the speed is faster than you put the three together, because the memory card working rate is too large when you put it at the same time, so the writing is slow, although it is troublesome to put one by one, but you will find that the speed is faster! Hope it helps! ps：

The larger the memory of the memory card, the faster it will be!

Write speed is a hardware issue that can't be increased.

The transfer speed of the card is not only related to the grade of the card, but also related to the format and file system you choose when you log the card, and it is also related to the transfer interface and card reader.

The transfer speed is the read speed and the write speed, for example.

R95·W60MB S refers to a read speed of 95MB s and a write speed of 60MB s. The read speed is the speed at which the software opens and reads the files in the card and exports, and the write speed is reversed. However, not all memory cards will indicate the write speed, and when there is only one speed on the card surface, it usually refers to the read speed. (This is a word game played by merchants, because the write speed is generally only one-third of the read speed, and the reading speed can make consumers feel that the speed is "good").

Interface testing is required, and the card reader must be supported.