On the Practice of a Memory Card Control: SanDisk SanDisk & Samsung Samsung

Last time I have written Toshiba and Lexar, this time I started to write the largest two memory cards on the market, Samsung and SanDisk, of course I never buy low-end Samsung or SanDisk, because it is hard to say It reflects the true level of these two companies.

In Zhang Aunt, my favorite black is SanDisk, but it is only limited to SanDisk's U disk. I have always been full of praise for SanDisk's high-speed memory card, and its extreme Pro series read and write speeds and small files. Read and write speeds can reach the best.

The first to play is Sandisk's black card, the extreme pro 64G. This kind of card should be a high-end card with a relatively high price/performance ratio. It can often be discounted to 219-229. First I bought photos.



The packaging is very beautiful, the word of hot stamping, the speed on the notebook's native interface is as follows:

After the transfer of Black King Kong USB3.0, the realization of a slight increase:

It can be seen that its 4K speed is extremely stunning, so its support for reading and writing small files is much better than Toshiba and Lexar.

After that, I also purchased the corresponding 128G version.



Its native interface tests are as follows:

The test results after transferring Black King Kong USB3.0 are as follows:

The performance is very stable. Basically, it can be considered that the quality of Flash Di 64G and 128G Extreme has not changed much. The performance is stable. As a top-level card, it is a good name.

Corresponding to the black version of the extreme pro, there is a slightly cheaper gold extreme version. I left a golden 128G at Amazon's 250 yuan. The links and figures are as follows:



The corresponding native interface test is as follows:

The results after transferring BlackKing USB3.0 are as follows:

Compared with the black version, the performance is almost unconventional, and the 4K speed is slightly better. Basically, there is almost no gap between the golden version and the black version. The normal Jingdong price is about 20, so if the budget is tight, you can buy it completely. Gold version.

Sandisk Extreme Pro also has the corresponding TF card version, the link style is as follows



The native interface test speed is as follows:

The test speed after transferring BlackGold USB3.0 is as follows:

The performance is good and fully reflects the highest quality of SanDisk. Its basic performance is consistent with that of the previous high-end card. It can be seen as an abbreviated version of SD. Here I repeatedly emphasized consistency because Samsung is a pit. Of course, I will talk about the Samsung pit.

Speaking of Samsung naturally had to talk about the Samsung Card u1 Pro, which was once a hundred dollars or less at Suning. I thought it might not be so good at the time. The result was that the test speed was fast and it took 2 years. Did not have any problems, it is resistant to exercise. Later, there was a price of 135 and it was also emptied. Let's take a look at the style:

The native interface test speed is as follows:

After the transfer, the speed is very fast. It is not U1's performance at all:

Taking into account such a low price, such a good writing speed, I think it has been more than nothing.

Next is Samsung's u3 Pro TF card. I bought it from Amazon. When it was cheap, it was about 170. It was the most cost-effective TF series I've ever seen. If I had to choose another one before, I must buy five. .



This set is equipped with a card sleeve, the design is very elegant. The native interface test is as follows:

The test result after transferring Black King Kong USB3.0 is as follows:

Regardless of the read and write speeds of large and small files, they have reached perfect requirements. With reference to its price, I really bought less.

Here we come to meet the Samsung first pit goods, Samsung Pro +, this card is known as Samsung's top card, the general place is not available, Jingdong have



Its price pits have to die, often 659, discounted at 599.


We all know that the speed of reading and writing is above 90M. Then I bought it when I was excited. The result of the native interface test is as follows:

Nima, so expensive, how speed does not seem to be high, look at the transfer later:

After the transfer is complete, it can not afford speed, basically even the white version of Pro is not comparable, with SanDisk can not fight, in fact, this speed can be parallel, but you are so expensive price, can Can not reflect a bit of professional quality, can not just change the vest to sell more than 600 directly.

In fact, I once saw that Guangdong had sold a batch of 128G smuggled Samsung Pro+. Its serial number was produced in South Korea. It was only the face that JS was printed wrong. XC printed it into HC. Its quality is similar to that of Pro+. More dirty. I thought it was a defective product, so slow reading and writing seemed to be the root cause. I don't think it is necessary to buy this version of Pro+. It's entirely possible that Samsung will make money, or consider the white Pro version. (The following is the private printing of Guangzhou JS Pro +, the price is still very expensive, about 490, do not recommend buying, so dirty card, it is easy to lose data in the future.)