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.Features
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Wi-Fi module. The presence in the design of the flash drive of a built-in module for wireless data transmission according to the Wi-Fi standard. This standard is widespread in modern electronics, its support is almost mandatory for portable devices such as smartphones, tablets and laptops. Initially, Wi-Fi was used to create computer networks, but more recently it has also been used for direct communication between devices, and the data transfer speed in modern versions is enough even for video streaming. The specific capabilities of flash drives with this feature may vary: some provide wireless communication only when connected to a computer (that is, they work like adapters), others are equipped with their own power sources and can function autonomously, playing the role of external storage with a wireless connection. Anyway, the presence of a Wi-Fi module may come in handy if you need to use a flash drive with the portable devices described above.
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Built-in card reader. The presence in the design of the flash drive of a card reader — a device for reading memory cards. Thus, data can be written, stored and read using not only the drive's own memory, but also removable memory cards. Such cards are increasingly used as devices for storing information in modern mobile devices — mobile phones, players, etc.; a card reader greatly simplifies the exchange of information between such devices and a PC
.... Given the compact size of modern flash drives, such card readers are usually designed for microSD and similar formats.
— Hardware data encryption. The ability to encrypt data to write to the drive. Such flash drives have an additional chip responsible for encryption, and, unlike conventional password protection, information is written to the drive in an already encrypted form. This allows you to reliably protect confidential data — in case of loss or theft of the device, it will simply be impossible to read it.
— OTG support. Ability to use a flash drive in USB OTG mode. This technology is used in smartphones, tablets and other mobile devices; it allows you to connect various external peripherals to such equipment, including USB drives. The peculiarity of such a connection is that mobile gadgets usually do not have full-sized USB ports, and the connection is made via a regular universal connector — microUSB, USB Type-C or Lightning (see "Connection interfaces"). Actually, the presence of one of these connectors is mandatory for a flash drive with USB OTG support — due to this, you can use a drive without an adapter with a mobile device. Note that ordinary flash drives that have only a full-size USB connector can also work well with mobile equipment — however, an adapter is required for connection, so such models are not considered OTG-compatible.
— U3 Smart Drive support. U3 Smart Drive technology allows you to use a flash drive to store a complete set of user tools: programs, data, passwords, settings, etc. Thus, the user is freed from being tied to a specific computer and can change them at his discretion, each time continuing to work from the place where he left off last time — which is especially convenient if you often have to move between several computers or travel a lot. On the computer side, U3 Smart Drive technology is supported only by operating systems of the Windows family (starting from 2000 and higher).
— Fingerprint scanner. A device for recognizing the user's fingerprint. Allows you to restrict access to the contents of the flash drive: with properly configured settings, you can read information from the drive only after the scanner recognizes the correct fingerprint. This prevents unauthorized access to sensitive data.
— Write protection. The presence of a drive protection system against accidental overwriting — usually in the form of an external slider switch that blocks recording. Switching the flash drive to read-only mode allows you to protect important information on it from accidental erasure.
— Read/write indicator. An indicator (usually a light one) that indicates that data is being read from or written to a USB flash drive. During the exchange of information, the drive must not be disconnected from the computer — this is fraught with damage to both information and the device itself. The read / write indicator allows you to determine whether data is being exchanged and, accordingly, whether the USB flash drive can be turned off.Strap eyelet
A hole in the body of the flash drive that allows you to securely fasten the drive to the strap and wear it as a key fob. As a rule, the
eyelet for the strap is located on one of the ends of the flash drive body (on the side or in the center).
Waterproof
The presence
of water protection flash drive. Also in this paragraph, the specific level of such protection according to the IP standard can be specified, where the first digit is responsible for dust protection, and the second for water protection. The higher the number, the better the level of protection. So, the water protection indicator of 7 already allows us to talk about the short-term water resistance of the model. However, in most cases, manufacturers do not conduct global tests and do not mark their devices with an IP level, only assuring about some kind of protection. What it really is remains a mystery.
