USB flash drives are now practically each. This is a simple and reliable way to transfer and storing information. But the failure of these devices has become a common problem for many users. Below are all possible reasons troubleshooting and elimination options.

First will be described simpler and effective methods Problem solutions, therefore, recommend recommendations in order. But do not forget that some problems, such as strong physical damage, eliminate will not work.

Reasons why the system does not recognize the device

For the USB device, the built-in special controller is in it. With a certain failure, it can be blocked that it will not give the computer to recognize the USB flash drive.

The reason for the failure can be a jump of the power, a sharp extraction of the flash drive, its incorrect formatting, etc. You can still correct violations, but it is impossible to restore the flash drive to the work of the Flash-drive.

It is possible to understand that the flash drive is not determined by the computer, by fact that

• The USB device is connected, but the computer writes "Insert the disk";
• the message "The device is connected is not determined";
• issues a request for formatting a flash drive;
• a data read error message appears;
• the indicator on the drive is lit, and it is not displayed in the computer, etc.

Also the cause of the failure can be:

• non-working USB ports of the computer;
• outdated drivers;
• viruses on the device;
• failure settings in BIOS;
• different file system of USB devices and a computer;
• assigning a flash drive the letters connected hard disk etc.

Check Driver

First you need to check if the driver is installed on the computer.

To do this, go to "Disk Management":

Now try tightening and paste a USB device, and see if it will appear in this window. If the flash drive is displayed, and the state is "FIXT", click on it with the right mouse button and select "Make the section Active".

If the status fails, the label is not distributed, "not initialized" or "unknown", this means that the device is damaged.

The system can assign a flash drive that the letter, which will also not allow it to recognize. Right-click on the device and select "Change the Disk Letter" and assign another value:

The flash drive driver itself needs to be checked in the Device Manager:

• start;
• control Panel;
• device Manager.

If the driver for the Flash drive is not installed, then yellow question marks will be lit near one or more USB devices.

Computer hardware errors

When a new flash drive is not defined in the PC, insert it into different USB ports. With normal operation in all connectors, except one, the cause of the problem is a problem in this port.

The same problem may occur when the flash drive is connected directly, but via a USB hub or extension. Try to connect the device immediately to the USB port. If everything has earned, the reason is the adapter.

It happens that a lot of devices are connected to a computer to a computer, then in the ports may not be enough power for the Flash drive. In turn, disconnect other devices from the ports, leaving only the mouse and keyboard. If now the USB drive earned, then the cause of the malfunction in the disadvantage of the power.

Photo: usb-hub transformer apacer p150

In this case, it is better to put a more powerful power supply unit or a USB hub with a separate power source. But if the size of the Flash device is very large, old laptop models simply do not stretch its food. With this variant, it is almost impossible to solve the problem.

One of the problems is heating connected USB - Devices. A malfunction can be in the installation on the device board.

You can check it on another computer - if continues to heat up, then the USB drive is faulty. And if in other places everything is fine, the port of the computer can be sinking.

If the Flash drive and USB port are working, the indicator will light on the device. Then the cause of the problem is systemic, not a hardware.

Video: We restore the flash drive that is not recognized by the computer

Check for viruses

Then why the flash card seems to be a computer, but not read? One of the reasons may be a virus that infects the USB storage boot file. Because of this, the device is or not loaded at all, or is immediately blocked by antivirus. And if it is displayed, it issues a warning "refused" in access when trying to open.

First of all, you should destroy the infected file download "autorun.inf". To do this, enter the address of the Flash drive (for example, G: /) in the Explorer.

• "Service";
• "Folder properties";
• "View";
• "Hidden files and folders";
• "Show hidden files and folders. "

Now the download file will be displayed. It must be removed and scanned by antivirus data from all over the device.

If it did not open through the Flash drive, use the command line:

Configuring USB in BIOS

The flash drive may not be recognized due to shutdown in USB ports. It happens very rarely, but it is better to check the settings just in case. Note that in the disabled USB port no device will not be recognized, so if others work normally, then skip this item.

To go to the BIOS, restart the computer, and during switching on the DEL or F2 button. On different PCs there may be different keys, therefore see what will be written on the screen (approximately "Press F2 to Enter Setup"). If a blue table with settings opened, then everything is correct - you went to the BIOS.

Now you should find the menu item in which the USB is regulated. Its name may differ, but most often this Advanced tab (Peripherals, Integrated Peripherals):

In it, look for USB Configuration / Controller item, etc. BIOS menu options are very much, therefore, specify the exact paragraph is quite difficult. But the USB word must be present. Now make sure that uSB support "Enabled", if not so, then switch them:

Some bIOS version Not only regulate the inclusion of the controller, as well as indicate the mode of its operation - V1.1 or V1.1 + V2.0 (already 3.0). Choose an option that supports all directions (v1.1 + v2.0). Save the settings and exit the bios (most often the F10 key).

USB drive is not determined by the system due to errors

After formatting, which could not be completely successful, the operating system may not see the flash drive due to errors. This can be checked in the "Disk Management" item, the entrance to which was described above. If there is a "FIRM" flash drive near the Flash carrier, but it is still not visible in the conductor, the reason for the formatting error may be.

Eliminate this can be new formatting. Press the right mouse button on the device and choose "format". Now the Flash drive must be displayed and operating without errors.

Different File Systems Flash Card and Computer

To restore work uSB Flash.which is not defined in the PC you need to change the file system, due to which there may be a conflict in the computer. The file system has the last most often NTFS, and the flash device is FAT32. In the "Disk Management" window, you can see the types of file systems of different PC media.

The problem solves correctly formatting. For this:

In the window that opens, take the compliance of the specified container and parameters of the flash drive. File System Specify NTFS and check the box near "Fast (Cleaning Table of Contents)". Now click "Start":

Confirm your actions:

After the process is completed, the system will notify this:

Photo: Formatting Completion Message

Necessary OS updates for work

With installed windows system XP may not be recognized by the Flash drive due to outdated updates needed to operate it. At the same time, some flash drives can work in USB ports of PCs, and others are not.

The main updates required for the normal operation of USB devices:

• KB925196 - incorrect recognition;
• KB817900 - Stop the port of the port after the device is removed and reloaded;
• KB968132 - Errors during connecting several flash drives;
• KB88740 - Error Rundll32.exe;
• KB895962 - Stop the operation of the USB device after turning off the printer;
• KB871233 - Flash card does not work after the PC output from sleep or hibernation;
• KB314634 - Support only old USB devices;
• KB312370 (2007) - Support USB 2.0.

Methods of recovery

When the problem is not detected, you can use special programs By recovery:

• Chipgenius - determines the manufacturer and other information about the device;

• Alcormp - refrestees USB Flash controllers most manufacturers;
• Jetflash. Recovery Tool. - Refreshes Flash drives from Transcend.

If the computer writes "Insert the disk" when loading, the problem may be in outdated drivers to be deleted.

For this:

• when the computer is turned off, turn off all USB devices (except mouse and keyboard);
• turn on the PC;
• download the program "DriveCleanUp";
• depending on the version of the OS, copy a 32-bit or 64-bit "DriveCleunup.exe" to the C: \\ Windows \\ System32 folder;
• go to command line and register "DriveCleunup.exe";
• drivers will start removing:

After that restart the computer. Insert the USB flash drive, and the system will find new drivers for it.

Flash drive may not be determined for many reasons, the main ones are the malfunction of the device or USB port, as well as system errorsMost of which are eliminated using proper formatting and installation of drivers. Some programs are also able to help restore USB Flash, therefore, in order to execute instructions.

There are several solutions to create backup data from data:

1. Built-in B. operating system Applications. Microsoft Windows. Provides methods reserve copy Data that suggest saving files and data on external or built-in media information. All modern windows version Already include the ability to create backup The necessary files or all the hard disk, if necessary. Provided Windows Functions They are full and independent, and are aimed at that you do not need to use third-party services or programs.
2. Copying data manually. You can always use the old proven way to create a backup data - manual copying data to external information carrier. It's long, but if you work with small quantity Data, such a decision may be quite acceptable for you.
3. Online services. Recently, the most popular acquires the most modern method data backups are numerous online services. Companies that provide reservation of your files straight on the Internet. Small installed on the computer background application, Creates copies of the necessary data and saves them on a remote server. However, provided by such companies to store your files in free version Do not allow them to use them as a comprehensive solution. Often the place proposed for reserving the place does not exceed 10 GB, accordingly, it is not necessary to talk about creating a backup copy of the entire hard disk. Such services are rather aimed at reserving a separate number of files.
4. Creating a disk image. This is the most complete solution for creating a backup copy of the data promoted. This method Ensures use third-party program To create the image of the entire disk, which can be deployed if necessary on another media information. Via this solution, It is possible to access all data in a short period of time that were on the disk at the time of its backup: documents, programs and media files.

QUMO flash drive models at 64GB, 32GB, 16GB, 8GB, 4GB, 2 GB:

• Cosmos;
• Fundroid;
• Hybrid;
• Speedster;
• Charm;
• SMART;
• Sticker;
• Twist;
• Tropic;
• NanoDrive;
• Click;
• Optiva;
• Slider;
• Aluminium;
• Shark;
• Q-Drive;
• Yin & yan;
• Domino;
• Dataguard;

South Korean-Hong Kong Company QUMO is a popular manufacturer of flash drives, multimedia devices, tablets and other electronics. Products of this company gained popularity due to low prices and good quality. The company's production lines are located both in Korea and in Taiwan, China.

Flashki and memory cards of QUMO 32GB, 8GB, 4GB fail quite often. This happens due to software failures, aging and imperfection of equipment, blotting, etc.

Flash memory, as well as memory cards has some number of recording / reading cycles. If the flash drive is operated long enough, there may be broken clusters. Also often the cause of failures are errors file System. They appear during the incorrect completion of the work (pulling the flash drive) or when electricity disconnects.

What if flash drives are not defined?

In cases where the flash drive or card is not defined when connected, you show zero memory or is defined as an unknown device - you need to restore. For some brands exist special utilities Recovery, but the Qumo does not apply to them. Therefore, for their "treatment" you need to use universal low-level programming programs.

1. Restore and save information stored on a damaged carrier. After the work of any restoring program, all data on the flash drive or memory card will be lost. Therefore, if this information is important, use the R-Studio program before repairs, or another similar one. With it, create a disk image, scan the amount of information, and then restore everything that can be restored. R-Studio is a program, not the fastest in work, but able to restore the maximum information on a spoiled carrier.
2. Use the service program suitable for recovering cards and flash drives QUMO:

• USB Disk Storage Format Tool. HP production program, perfectly suitable for formatting QUMO storage devices.
• Ezrecover - Universal softwareAmong others can repair the QUMO drive. After installing the program, insert a battered USB flash drive into your computer and run Ezrecover. The program will give an error when you first start, but the next time it will definitely define the USB flash drive or the card and give the opportunity to restore it.
• Flashnul. This error program does not eliminate, but simply reveals the defective parts of the device and reset the information.

Tips: fifty percent cases, SD card, which cannot be placed on a computer, is perfectly formatted on another device. Try formatting using a phone, a camera or something else. If it works, and you can read and format the flash drive in this way, then then repeat the formatting on the PC.

In particularly difficult cases to restore flash drive or 32GB, 8GB, 4GB cards, you need to open the carrier housing and close the chip contacts. If you do not have such skills, it is better to leave this work to specialists.

Do you have an inoperable USB flash drive or other media and you think about what program to choose to restore?

We reviewed the most popular utilities. Which of the above programs will suit you and will restore the flash drive with 100% warranty?

Pull out all the data will help the only one in its kind Hetman Partition Recovery.She is loved by both newcomers and pros for the convenience, speed of work and an advanced information recovery algorithm. Your files will be found and copied even when there is no access to the FS carrier or it is damaged.

JetFlash Recovery Tool is a branded utility that has the most simple interface and support for working with TRANSCEND, JetFlash and A-DATA drives. Management of only two buttons, it is clearly for you to do. You should not forget that the cleared data cannot be restored, therefore, the preliminary saving of information from the flash drive will not be superfluous.

If you have a need to constantly have a universal program that is convenient to apply as on home computerAnd outside of its limits, we advise D-Soft Flash Doctor, its platform does not imply a pre-installation, the launch is made instantly on any PC. Software Suitable for repair, unlocking,
restoration of the volume of the flash drive and its performance.

If you need to restore SD cards, we advise you to download F-Recovery SD, which has an effective set of simple options for working with damaged flash drives from digital cameras and other portable devices. From the point of view of a professional approach to Flash drives, it will be interesting to use Flash Memory Toolkit, the application contains a whole complex additional functionalitycapable of testing flash drives, in addition, the program works with any versions of the OS from Microsoft.

Recognize maximum number different types Flash Drive flash drives, among the above utilities, as well as quickly reanimate the performance of drives, can the formatting utility and uSB recovery Disk Storage Format Tool, possessing very clear and convenient interface. Repair Program uSB flash drives Disk Storage will be able to quickly restore data damaged hard sections Disk Even if the flash drive firmware problems are found.

If no flash drive program helped, we recommend checking the memory controller status using the ChipGenius utility. The prog works with USB, micro SD, SD, SDHC and YUSB-MPZ players of Kingston manufacturers, Silicon Power, Transcend, ADATA, PQI. Further actions to correct errors, the restoration of lost data is appropriate only by Kli
The flash drive is determined in Chip Genius.