First of all, it is not rigorous to judge the advantages and disadvantages only according to the brand, not to mention that different batches of the same model products are directly different and it is too difficult to control. Even within the same brand, different differentiated products with different positioning and different models will be defined. It is impossible to find a good disk in a low-end positioning product. This principle must be clear.

Therefore, we regard "good" as "stable quality" and say:

To meet this requirement, of course, first-line brands are preferred over miscellaneous brands, such as SanDisk, Toshiba, Kingston, Lei Kesha, Weigang, Chuangjian, etc. (refer to the above mid-range, the stability of entry-level products needs to be improved), which has its own stability and reliable after-sales guarantee; Secondly, second-tier brands such as DIY brand, Taipower and Patriot have reached a certain level, and their stability is also guaranteed, so they can be selected according to the situation; Finally, there are all kinds of unknown brands or counterfeit products. Don't buy them, which belongs to the lowest level.

After that, take "good" as "excellent performance" and say:

First, the high-end positioning products of major brands, such as Kingston's "DTUGT, DTHXPU30" series, HXS3, DTWS and other models, SanDisk's CZ8X, CZ88X series, Toshiba EX, MX series (some of the above models have been discontinued) and other USB flash drives. These disks use high-end master control, and some even use solid-state master control, with high-quality MLC flash memory chips.

Second, it is a DIY disk. There are always people who oppose or even vilify this kind of disk, but inevitably, its performance is not a little higher than most entry-level U-disks on the market, and its reading and writing speed can generally reach 100MB+, and the highest is 400MB/s, so I think it is also worth considering buying.

That's about all I can think of. If there are any gaps, please follow up.