Hello,
First of all, thank you for your purchase.
If you are trying to upload a file larger than 500 kilobytes (KB) to your WordPress site and are encountering a failure, this is because WordPress has a default maximum upload file size limit of 500 KB.
This is a security measure to prevent the uploading of large files that could slow down your website or compromise its stability. To upload larger files, you will need to increase the maximum upload file size limit in WordPress. You can do this by editing the PHP.ini file, the .htaccess file, or by installing a plugin that allows you to adjust the maximum file size limit.
Please check details, here: https://www.wpbeginner.com/wp-tutorials/how-to-increase-the-maximum-file-upload-size-in-wordpress/
You might also have to contact hosting support and ask about this, as the limitation might be also on their part.
Regards, Szabi – CodeRevolution.