USB version
The method of connecting a flash drive to a PC (laptop) provides both a connector (plug type) and an interface (speed). Among these are:
USB 2.0,
USB 3.2 gen1,
USB-C,
microUSB and
Lightning. More details about each of them:
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USB 2.0. A universal interface used in computer technology to connect a wide variety of devices, including external drives. Version 2.0 provides data transfer rates up to 480 Mbps and is the most common today; almost all models of computers and laptops, and even some tablets, are equipped with such a port (often more than one). Note that the term "USB 2.0" in this case means an interface that uses a classic USB connector; models with a Type-C plug are listed in a separate category (see below).
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USB 3.2 gen1. An improved version of the USB standard. Provides up to 10 times faster (up to 4.8 Gbps) data transfer rates than USB 2.0, as well as higher power, making it easy to connect multiple devices to a single port via a hub. As in the case of USB 2.0 (see above), devices with a classic USB connector are allocated to this category. The USB 2.0 and 3.2 gen1 standards are mutually compatible — that is, you can easily connect a device of the second version to the USB 3.2 gen1 port and vice versa. In this
...case, the speed, of course, will be limited by the capabilities of the slowest interface, i.e. USB 2.0 At the same time, manufacturers can label their flash drive 3.1 (the former name of the modern 3.2 gen2 interface), however, the speeds show that this is not the second generation, but the first, i.e. 3.0 by the previous name. Changing the names of the interfaces can be even more confusing, so look at the speed indicators, which will more accurately describe the performance of the model.
— microUSB. A kind of "mobile" version of the USB standard, used in portable devices like smartphones and tablets. Accordingly, flash drives with such a connection interface are designed specifically for mobile gadgets, or rather, for equipment that supports the USB OTG function (see "Functions / Capabilities"). To connect via USB OTG peripherals with a regular USB plug, you would have to use an adapter, and a microUSB flash drive can be plugged in directly. At the same time, the design of such flash drives can also include a classic full-size plug, which makes them very versatile.
— USB-C. Formally, USB-C is not a separate connection interface, but a type of connector through which a connection can be made using one of the USB versions described above. The connector itself is significantly different from the classic USB connector. Firstly, it has a smaller size and can be used with equal ease in both stationary and portable equipment. Secondly, it is made double-sided, which greatly facilitates the connection: the plug can be inserted the first time even blindly, without worrying which side to turn the flash drive. This plug is not compatible with earlier USB ports, which is why USB-C flash drives are most often used in parallel with a regular full-size plug.
— Lightning. Also known as 8-pin. Apple's proprietary connector used in portable equipment (primarily iPhone and iPad), since 2012. Accordingly, the Lightning connector is equipped with flash drives designed for use with "apple" gadgets. Moreover, this interface, usually, is not the only one — it usually complements the standard USB connector.Read speed
The maximum speed of reading data from the drive. The
higher this speed, the faster you can rewrite information from a flash drive to a computer disk, which is especially important when working with large amounts of data. In fact, the reading speed depends on a number of factors, including the interface bandwidth (see Connection interface), the design features of the drive and computer, the software used, system load, etc.
Write speed
The maximum speed of writing data to the drive. The
higher the write speed, the less time it takes to transfer information from a computer to a USB flash drive, which is especially critical for large amounts of data. Just like the read speed, in fact the write speed is determined by a number of factors, in particular, the connection interface (see Connection interface), the design features of the drive, system load, etc.
