[Fixed ]USB flash drive need format before use, How recover data-[2022 update]?

2022-05-13 10:58 641

1 An introduction : 

When you open the USB flash drive, a pop-up message needs to be formatted. Solid-state USB hard drive Mechanical USB hard drive Built-in USB hard drive, USB drive, USB flash drive memory card (SD card Memory card recording pen) With the use of time, there will be a message that cannot be opened, cannot be accessed, becomes RAW format, or prompts formatting. If the partition on the portable USB flash drive cannot be opened, the data inside cannot be accessed, so many friends face the problem of data loss. This article describes how to recover data in this case when the removable USB hard drive prompts formatting 
In the digital age, our daily work, study, and life are inseparable from all kinds of data. We receive or process all kinds of data every day, and the use of USB drives as data storage is becoming more and more widespread. The portable USB flash drive can provide huge storage space, we can transfer the data in the computer to the portable USB flash drive for backup or transfer the data to other devices. The internal structure of the removable USB flash drive is the same as that of the ordinary computer USB flash drive, but with the addition of a removable USB flash drive box, which can be connected through the COMPUTER USB port, and it is more convenient to use. When we are using the USB drive at ordinary times, we sometimes encounter situations that can not be opened and accessed. If a partition on a portable USB hard drive cannot be opened, the data inside cannot be accessed, so users have to face the problem of data loss. 

2 Question: 

2.1 USB Stick needs to be formatted 

the USB Stick needs to be formatted before use 
flash drive says it needs to be formatted 
USB disk needs to format before use 
internal USB hard drive : 
Microsoft windows you need to format the disk 
windows 10 you need to format the disk in the drive 
you need to format the disk in drive d 
you need to format the disk in drive e 
you need to format the disk in drive f 
you need to format the disk in drive fix 
you need to format the disk in drive g 
you need to format the disk in drive raw 

2.2 Mobile Device Problems 

my flash drive says it needs to be formatted 
my thumb drive says it needs to be formatted 
my USB drive says it needs to be formatted 
Pen drive needs to format the problem 
USB drive that says needs to be formatted 
USB you need to format the disk before using it 
flash drive suddenly needs to be formatted 
memory card you need to format the disk 
memory stick needs formatting message 
SD card you need to format the disk 

2.3 Fault symptoms: 

For example, if you double-click a partition on a portable USB hard drive in File Explorer on your computer, the system will pop up with an error message, 
The portable USB hard drive won't open 
1 Prompt "Format" 
2 "File or directory is corrupt and unreadable", 
3 What if it becomes RAW? 
4 "The disc in the drive needs to be formatted before it can be used. Do you want to format it?" 
5 The disk can also become empty, that is, the original partition is missing. 
6 Only see the capacity can not see the file inside 
7 uninitialized 
8 Inaccessible, location unavailable 

2.4 The case of 1 

USB drive often cannot exit safely, so old is forcibly pulled out, this finally retribution came, has been in the frequent use of the installation of all kinds of software disk crashed, appear first "to access X disk, must the first format", I click to cancel, appeared again "can not access, file or directory damage and can not read". 
The phenomenon of 2 
Newly bought a USB drive, the classmate borrowed Copy a game, Copy to discover packet damage, prompt "file or directory damage and can not read", I hurriedly check, newly bought USB flash drive appear this problem, is it not bought to have a bad track of gray goods? Copy and paste other files in this partition, no problem, but can not rule out bad disk track. 
The phenomenon of 3 
The use of USB drive will occasionally encounter the USB flash drive can not pop up, always prompted that there is a program in the occupation, many people are used to directly disconnect. This operation is very dangerous and can easily cause the USB hard drive to fail. 

3. Common reasons why a USB drive cannot be opened 

There are many reasons why a USB drive cannot be opened. Here are some common reasons for reference: 

3.1 Insert and remove the removable USB flash drive incorrectly 

Under normal circumstances, we need to click before we pulled out a USB drive on the computer "safely remove hardware and pop-up the media", the reason for doing this is to prevent the USB drive system is, speaking, reading, and writing the data above, if directly pull out is likely to cause damage to the file system, file directory information confusion and other issues, leading to partition to access. 
An error occurs in the partition table of the removable disk 
The disk partition table is incorrect, and the data in each sector cannot be displayed correctly. As a result, the directory is damaged and cannot be used.


3.2 Insufficient USB power supply or data line problem 

Because of this problem, we can directly change the USB interface or data line to try, if there is still this problem, you can rule out this guess. 

3.3 Viruses destroy removable USB flash drives 

If the computer has a virus, it can also damage data or partitions, causing data to be inaccessible. 

3.4 The USB flash drive has bad sectors 

If a bad sector occurs on a USB flash drive, especially in the storage partition or partition table, the USB flash drive may fail to open and the READ/write speed may decrease.


3.5 The Mobile Disk Box is Incompatible: 

USB drive box and USB drive incompatible words will also cause access problems, this time you can remove the USB drive box, directly connected to the computer motherboard to see if it can be accessed normally. 

3.6 Virus or Malware Damage: 

Some computer viruses or malware can cause damage to data or partitions so that data cannot be accessed properly.


3.7 Partition adjustment or partition merging is interrupted: 

When you use partitioning software to resize or merge partitions on a USB drive, failure or unexpected interruption of the operation often causes file system directories to be damaged. 

3.8 The magnetic head of the USB flash drive is faulty 

In more serious cases, the head of the USB flash drive fails and can no longer be used. 
If the partition on the portable USB flash drive cannot be opened, the data inside cannot be accessed, so many friends face the problem of data loss. 

3.9 An error occurs due to vibration during the copy. 

Cause of the error: The removable USB flash drive may be used for a long time and natural aging, or there may be vibration in the copy process caused by the error. 

4.The solution 1

4.1 There are a lot of important files in the USB drive that did not backup, dare not format how to do it?


If found that the USB drive can not open, do not worry, the following method can easily solve the problem of the USB drive can not open. 

If the USB flash drive has important data, you are advised to recover data from the USB flash drive that cannot be opened to reduce the impact of data failure. At this time, it is recommended to find professionals or experienced related personnel to operate, to avoid unnecessary losses caused by improper operation.

If the USB flash drive is faulty or the file is deleted and lost, it is recommended to consult a professional data recovery company for proper processing the first time, or directly go to a professional data recovery company for formal and detailed detection. You can determine whether the fault is caused by improper operations or hardware faults. If you need to extract the data from the faulty USB flash drive, you can choose the USB flash drive data recovery, to ensure the security and integrity of your data, to let you enjoy professional technical services, to the greatest extent to save your time, make up for the impact of missing data, save some unnecessary trouble. 

5 Solution 2:

Do not use formatting in this case because it will reduce the success rate of data recovery 
Retrieving data 
Reformatting the USB flash drive 
USB flash drive formatting loads data 
Encounter this kind of problem or very anxious, how to do it there is room for recovery, according to the following operation luck directly complete repair, data is also in, bad luck can also find the data, and then formatted USB drive on the line. 

5.1 First, remember to do not to point formatting in this case 

After formatting, the USB hard drive can be used again, and the original files can be rewritten. To be honest, it is a bit cumbersome, but if you fix it directly, you may damage other data. 
1. First, right-click the drive letter of the USB hard drive, F in this case, and a window will pop up. In this window, select Properties.

2. The following window will pop up. In this window, select Tools.

3. Select Check.

4. this window appears, click "Scan drive".

5. The scan begins, wait patiently for a while, when the scan is complete, the problem is solved.


5.2 Ii. If the above scan fails, we can use the command to repair it: 

1, Win7 start -- program -- accessories -- right-click command prompt -- to run as an administrator.

2. Enter drive letter /f, for example, CHKDSK d: /f. Note that H checks the fixed drive letter, leaving a space after the colon, and not "/f". Wait until the command is complete.


5.3 Here's an example: 

Open this folder, normal, you can browse the files inside. Right-click the folder properties, see that it is a read-only property, remove the read-only property, click OK, prompt file inside the folder is damaged, cannot reset the property, find the file, as expected, has been damaged, cannot open normally. Failed to delete. The rd /s command in MS-DOS failed to be forcibly deleted. The folder fails to be forcibly deleted by running the del /f command. Oh, I can't believe I can't delete you. 
CMD enters the disk directory, runs CHKDSK /f, the message CHKDSK is verifying files... After a few seconds, a message is displayed indicating that the *.* file index is successfully deleted. Run rd /s + folder name again and the folder is successfully deleted. 
Earlobes, the classmate copy file of the game when the other machine is running the game, general game program to ensure the security and integrity of data, when the game running in the form of resources alone enjoy access to certain files, these files are temporarily locked, copied to the file is not complete at this time. So you will be prompted that these files are corrupted. Let the classmate copy again, copy the data when do not run the game, or copy the game after packaging. Problem solved.


6. Recover data 

According to the principle of data deletion and recovery, we can use the data recovery tool to scan and restore the faulty data. However, do not format the mobile disk before it is formatted. After formatting, the data will be restored, but the data will be affected to varying degrees.

We can open on the computer "sure master data recovery", select "USB flash drive data recovery" mode, and then click the USB drive drive scanning, data can see recovered, after the completion of this includes images, video, documents, etc., double click can also preview the data, no problem to restore and maintain.


6.1 Well, the above is the related reasons and methods of USB drive failure, we can refer to oh. 

The phenomenon of 
If the above method does not work, we have to do the next best thing, first restore the data of the mobile drive, after recovering the data we can directly format the whole mobile drive to recover the data and restore the drive. 
There is two data recovery software available here, one is DiskGenius professional edition, the free version does not seem to be able to recover large files, and the other is EasyRecovery. 
The first example is diskGenius, which does not cover data recovery. 
Enter the tool page, before opening the tool, the USB drive should be connected to the computer, and the USB flash drive can be directly detected: 
Click on the drive to see a list of files, or browse files on the right:

Right-click and copy the files listed in "Browse files" on the right. This is to copy the contents of this folder first. Do the same for other files.

File replication process, the best copy to a new folder, and ensure that the disk space is sufficient, the file is too large, the target disk space is insufficient, have to copy the failed file to a new location:

After the file is copied, select the USB flash drive and format it. After the file is finished, the format window itself will close. You can see that the capacity bar above is full, 500G, normally available is more than 460 G. 

6.2 The second software, EasyRecovery, is slower to recover data than DiskGenius, but it does recover data. 

It is very simple to use, download the data directly click on the recovery line and after a long wait, the data is finally restored. Restore after all the files are in, luck is better ah, just some directories did not, ok, as long as the file is good, it is years of painstaking efforts of the data. 
Step 1: Open EasyRecovery and select the media type. To restore the removable USB flash drive, select "USB flash drive drive" to try.

Figure 1: Select media type as USB flash drive drive 
Note: Portable USB flash drive is a mass storage device, so the best choice is a "USB flash drive drive". 
Step 2: Click Continue. In the Select Volume labels, you want to scan window, select the example volume label named mobile Disk I.

Figure 2: Select the volume label to scan 
Step 3: Select a recovery scenario. This window provides multiple disk data recovery solutions, such as Recover Deleted Files, Recover Formatted media, and Disk Diagnosis. You can select Recover Deleted Files or Recover Formatted Media for data recovery of mobile disks.

Figure 3: Selecting a recovery scenario 
Step 4: After confirming the options, click "Continue" to scan disks for missing files. Wait until the scanning is complete. The time required varies according to the size of the disks.

Figure 4: Scanning disks 
After the search, in the "Save File" window, all data in the USB drive will be displayed in the form of a list, find the data to be restored, select it, right-click "Save as", and save the data to another path, the USB drive data can be successfully retrieved.

Figure 5: Save the file 
Through the above two data recovery software is absolute can get data back, this can not only recover data but also the new USB drive formatting again normal use, to restore data copy before back to USB drive is to complete the repair, of course, we generally when using disk scan command has been repaired, there is no need for a third data recovery solution to solve this problem. 


Click browse to select the partition where your parents want to store the damaged partition files. For example, if there is a problem with Disk D, the data in disk D will be returned to disk E, and disk E will be selected to avoid the risk of data loss ,Then reformat the file on drive D and copy it back to drive D 

6.3 NO.2 The ICONS of files and directories are still displayed. After you double-click the ICONS, a message is displayed indicating that files or directories are damaged and cannot be read. 

Solution: Try using the disk scan tool that comes with WINDOWS. On the Start menu bar, click Run and enter CMD. The DOS status dialog box appears. Enter the drive letter of the disk with damaged files at the cursor and press Enter. Then enter CHKDSK to view related detection information. "CHKDSK" is the meaning of "check disk", detection command. 
If any error is found, type CHKDSK /F after the cursor and press Enter to rectify the fault. /F indicates the fix repair command. The message cannot be locked is displayed. Enter Y to agree Forcibly detach the volume and press Enter. The disk is then scanned and repaired. A few minutes later (the amount of time varies depending on the size of the disk partition and the number of error files), the "Windows Corrected file System" repair message appears.

BTW Xiao Nuo feels it is necessary to introduce CHKDSK related knowledge to the relatives

To run the CHKDSK command on a fixed disk, parents must be members of the Administrators group.

Check for locked drives on reboot

If you want CHKDSK to fix the disk error, you could not have opened the files on that drive before. If a file is open, the following error message is displayed:

Chkdsk cannot run because the volume is in use by another process would you like to schedule this volume to be checked the next time the system restarts? (Y/N)

If you choose to check this drive the next time you reboot your computer, CHKDSK will automatically check this drive and fix errors after you restart your computer. If the drive is a boot partition, CHKDSK will automatically restart the computer after checking the drive.

Reporting disk errors

The CHKDSK command checks disk space and file allocation table (FAT) usage as well as NTFS file system usage. Chkdsk provides information specific to each file system in status reports. Status reports show errors found in the file system. When CHKDSK is run on an active partition without the /f command-line option, it may report false information because it cannot lock the drive. You should use CHKDSK irregularly to check for errors on each disk.

Fixing disk errors

The CHKDSK command fixes disk errors only if you specify the /f command-line option. Chkdsk must be able to lock the drive to correct errors. Since fixes usually change the disk's file allocation table and sometimes lose data, CHKDSK first sends a confirmation message as follows:

10 lost allocation units were found in 3 chains.

Convert lost chains to files?

If you press Y, Windows saves all the missing links in the root directory in a file called filename. chk. After the CHKDSK is complete, you can see if the files contain the required data. If you press N, Windows will repair the disk, but it will not save the contents of a missing allocation unit.

If you don't use the /f command-line option, CHKDSK sends a message when there are files that need to be fixed, but it doesn't fix any errors.

If you use CHKDSK/F on a large disk (say, 70 GB) or a disk with a large number of files (millions), this can take a long time (say, days) to complete. Because CHKDSK does not hand over control until its work is complete, the computer will be unavailable during that time.

Checking FAT Disks

Windows displays the CHKDSK status report for FAT disks in the following format:

Check NTFS disks

Windows displays the CHKDSK status report of an NTFS disk in the following format:

Use CHKDSK in the presence of open files

If there are open files on the drive, CHKDSK will send an error message after specifying the /f command-line option. If the /f command-line option is not specified and open files exist, CHKDSK reports missing allocation units on disk. This can happen if the open file is not recorded in the file allocation table. If CHKDSK reports a large number of missing allocation units, consider repairing the disk. 

7. Instructions on exit codes

0 No error was found.

7.1 Error found and fixed.

7.2 The disk has been cleaned (for example, fragment collection), or the disk has not been cleaned because /f was not specified.

7.3 The disk cannot be checked because the /f option is not specified. The error cannot be fixed or the error is not fixed.