Write speed
The maximum speed for writing data to a memory card.
High write speed is important for tasks that involve storing large amounts of data in a limited amount of time. However, note that this paragraph indicates the theoretical maximum speed for perfect conditions; in fact, this value can be noticeably lower. Therefore, the characteristics of memory cards also indicate the minimum guaranteed write speeds in different modes — the general speed class, the UHS class, the video recording class and/or the class for applications. All of them are described in more detail above. However, you can also evaluate the capabilities of the carrier by the overall speed: other things being equal, a card with a higher theoretical speed will work faster in fact.
As for specific values, speeds
from 4 MB / s and
from 6 MB / s are practically not found nowadays,
from 10 MB / s and from
16 MB / s can be called average indicators,
from 50 MB / s — above average, and the fastest models have a maximum write speed of
100 Mbps or more.
Endurance (loop recording)
Extended-life memory cards - in other words, such media is able to endure more rewrite cycles than regular media. Such durability is achieved, in particular, through the use of special controllers that provide the most even distribution of the load over the memory cells.
Endurance memory cards are positioned primarily as the best choice for video cameras operating in adverse conditions - DVRs (including motorcycle and bicycle cameras), action cameras, outdoor surveillance cameras, etc. In such video equipment, the so-called cyclic shooting mode is often used: when the drive is full, new material starts automatically overwriting older ones, thus avoiding breaks in recording. This type of memory card, due to its increased durability, is excellent for working in this mode. In addition, media marked with Endurance usually also have an increased degree of overall protection - from dust, moisture, temperature extremes, shock / shock, and even X-rays. This increases the likelihood that the contents of the card will remain intact even in the event of an accident or other emergency.
Working resource
A measure of the lifespan of a storage device, expressed in thousands of hours. The parameter determines the approximate working life of the memory card with constant cycles of writing and erasing data. It is indicated, frankly, infrequently, but it is by this indicator that it is most preferable to select a drive for devices operating in the cyclic recording mode of information (for example, video recorders, cameras and video surveillance kits).
Manufacturer's warranty
Manufacturer's warranty provided for this model.
In fact, this is the minimum service life promised by the manufacturer, subject to the rules of operation. Most often, the actual service life of the device is much longer than the guaranteed one. But an indicator of 5 years suggests that the memory card is more likely to be lost or become irrelevant. You can also come across
a lifetime warranty, but in this case it is better to clarify the details of what it applies to. And in any case, it implies a certain period of time, though measured in decades. In addition to confirmation of reliability, such a guarantee allows you to contact the supplier after a while to eliminate possible problems (of course, not mechanical). But the difficulties in implementing this procedure (the representative office is located only in large cities) and the rare cases of the need for this (after all, it is easier to buy a new flash drive, with the exception of vital information on the old media) make the lifetime warranty more of a marketing ploy than a cool chip.
