Hi , If you want to do it manually then follow following steps.
1- make a zip folder of wp-content folder.
2- now generate the database script.
3- open the generated script in any good text editor. replace localhost:port with your new web url in complete doc.
4- upload folder in installed wp directory and replace wp-content
5- now open the database panel and run the script .
6- open the wp-config file and change the username , password , and server address.
Looks like you are running Plesk. Have you checked on their site for how to give php permission to write to a directory?
Since you are on a windows server you should be setting this in the IIS manager. But basically you need to give write permissions to IUSR which is the user running php under IIS. Hope that makes sense.