How to fix unusual SQL file download issues in localhost/PHPMyAdmin?

When you export a database by using PHPMyAdmin, it results in downloading an unusual file, it may happen because of corruption during export. It may be possible that the export process itself has problems. You can also check PHPMyAdmin's configuration settings. 

There may be a limitation in the size of exporting files.  Therefore, you can change this limitation according to your specific requirements. To resolve these issues you can also break down the data which you want to export. In it, you can export your files in smaller parts instead of sharing entire files at a time. Sometimes this problem may arise when you do not upgrade the PHPMyAdmin. 

Therefore, try to upgrade or reinstall it. Check the server also to ensure there are enough quality localhost servers available or not to export the data. You can export your data through the command line interface of MySQLso that you can gain a more stable and efficient way to share your valuable data. Sometimes, issues can arise due to the tool's configuration and local host. If the issues remain the same, try to seek support from a system or technical support provider. They may provide more tailored assistance to you.