What is a CHK file?
The CHK file extension is a file that can be created and used with more than one program. This means that if the file was created by a particular program it might not be compatible for other programs. For example if the Windows tool Scandisk creates the CHK file then it is useless to other programs. This is because Scandisk has found bad file or clusters during a scan and renamed the bad files using a .chk file extension.
Another program that is known for creating Chk files is Sophos Anti-Virus. This program creates file using the CHK file extension to store information about virus definitions. These files are updated with InterCheck, a central virus database. The Sophos CHK file can only be modified by changing the reporting log and configuration of the InterCheck program.
As you can see, these files were created for very different purposes and there is no way that a chk file created by one program can be used for the other. Not only will the file be useless to the other program, it will not even recognise the CHK file unless it is stored in an exact location.
Can I Delete a CHK file?
As these files are generated automatically by certain programs, it is no recommended that you try and manually delete a CHK file. The program that created the file usually is in charge of altering or deleting it.
FOUND.000 Folder With CHK files on my USB?
So you found a FOUND.000 folder that contains .chk files? Well these files have been created after using Scandisk. If you have found these files on a USB flash drive then they could be important files that once existed on the drive.
USB drives are prone to data corruption if removed during a file transfer or a power shortage steps in. Either way, data corruption can occur and scan-disk will sometimes automatically run, identify the corrupt files and rename them into CHK files.
Can You Rename a CHK File?
Yes, if you know what the original file extension was, you can almost always simply rename the file. For example, you might have only had Microsoft Word files on your USB drive, so when you find CHK files you know that the original file extensions would be .doc or .docx. Sometimes you can view chk files as text files to get a clue as to what file type they are.