Windows 7 system scans and repairs the removable disk after the file is lost in the U disk

There are two options:
1, scan and repair (recommended)
2, continue, but do not scan

Millions of warnings
Be sure to check the first option when you have important information in your USB flash drive: Scan and repair (recommended)
Although this will prevent future files from being copied to this device or There is a problem with the disc, but you also want to make sure that the data in your USB flash drive is irrelevant and then scan and fix it.
Select the consequences of scanning and repairing
Some data will be lost on the USB flash drive, and some files will be damaged.
Instead, you will find one more folder in your U disk (can be seen under the hidden files and system files) FOUND.000, there are several files like FILE0000.chk in this folder (quantity And the file name is in order.
Lost files go and retrieve
1. If you scan and fix your U disk, you don't have to worry about losing the file. Not surprisingly, you will see a file with a .chk extension in the FOUND.000 folder, just like the file you lost.
2. According to the file size, change the chk extension to the original file name. If it was doc, jpg will be changed to doc and jpg.
3. It is estimated that some files can be retrieved (depending on the character). The word document is relatively easy to retrieve. The video file can be seen at a glance. After the extension is changed, it may not be played.
4. Note: Be sure to remove the hook in front of the extension of the hidden file in the folder option, in order to facilitate the modification of the extension.
The reason for the loss, the reason why the FOUND.000 folder and the chk extension file appear.
1. Whether the U disk or the disk encounters unexpected power failure or program interference during data reading, the file system and files may be damaged. Win7 itself comes with a repair function that will repair your damaged file system and the file itself (this can be read without damage, but only minor problems), so that these files are treated as an exception during the repair process. The disk fragmentation file is directly placed in the FOUND.000 folder, and the extension is also modified.
2. Not only will U disk have such problems, but also the local disk of the computer. The method of recovery is the same as above.