You can cancel an ongoing Export to File operation. For example, you can cancel your Export to File operation while a large number of records are being exported to a file.
The Export to File operation can be canceled only by the user who carried out the operation.

When you carry out the Export to File operation, you are automatically navigated to the "Exported Files" screen.
On the screen, click Cancel for the row of the Export to File operation you want to cancel. The Cancel button is displayed while the export status is either "Waiting" or "Processing." You cannot cancel your operation once it is complete.

It takes a few seconds to a few minutes to cancel the Export to File operation.
When the export process is canceled, you will receive a message saying "You have canceled the export."