As you know, every phone that you use a 40W charging adapter will not charge at 40W. Although the adapter can give this output, your phone should also be able to receive 40W, so that it can reach this value and charge quickly. In this context, we see different values on different devices.
This is also basically the case for the storage units in our focus. Especially when sending files from portable units to computer or from computer to portable storage units, you can see the difference in speed. Now we shed light on why.
First of all, there are two variables that the file transfer speed depends on:
The first is the read and write speed of the storage unit (HDD or SSD) in your computer. The second is the read and write speed of the other storage unit you will transfer the file to. Often times, you may find that the read speed is higher than the write speed on USB, HDD or other storage.
That’s why storage devices like USB are often represented by read speeds only.
Most of the time, high read speed brings high write speed, but since this is not a standard, it is necessary to check both. The same goes for SSDs and HDDs.
For example, an SSD that writes 500MB files per second may not give you this value.
Because in file transfer, besides the writing speed, the reading speed is also decisive. Your SSD, which writes 500MB/s, may perform the transfer slower because of the slower read speed of your HDD.
Likewise, it can be the other way around. If you want to transfer a file from your C disk to your D disk and the read speed of the HDD/SSD to which your disk is connected is behind the write speed of the target HDD/SSD, your transfer speed will still be limited.
Therefore, it is useful to take a look at read/write speeds even when buying USB or SD cards as well as HDDs and SSDs.
Because hardware with slow transmission speed will waste a lot of time in the long run. Of course, we can say that this is an issue that will be shaped according to the person, since it will not be so important for those who use the storage unit as a warehouse full of photos that are taken from time to time.
SD cards contain more information in this context. For example, the phrases U, V and C give us an idea about the speed of these cards. When you look at it (as an example), an SD card with the phrase U3 means that it has a continuous write speed of at least 30MB / s. This changes to UHS 1 and 2 seen on modern SD cards.
V sign means 90MB/s for video usage -if we take an SD card with V90 as an example-. Class C goes up to C2, C4, … C10 as multiples of 2 and refers to the write speed on conventional SD cards. In this context, it seems that an SD card labeled C10 will undoubtedly offer 10MB/s write value. So you can think of these phrases as a ‘class’.
As a result, we have seen that the variables that affect the speed between the two devices to which the file is transferred are the read and write speeds of both devices.
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