Hi @acerNZ
1. So how do I know what is the Site Address and What is the folder ? Please can you explain me how to find out, If I have to create a few more apps?
Site Address is something like:
https://companyname.sharepoint.com/sites/sitename
Folder in sharepoint usually refers to folder in library.
Here is a passage describing folder in sharepoint:
Folder vs. Library in SharePoint - SharePoint Maven
2. File content is empty
If you want to get file content in sharepoint, then please use the action ‘Get file content’.
You can use get file content to get file from library or folder or list attachments.
For example, I use this action to get file from list attachments:

If you still get error, could you take a screenshot of your detailed steps trying to get file content?
3. As a test, I created two simple local file systems to copy file from one folder to another and still I get gateway error, I have installed gateway and I have restarted it before testing this, Still I get this gateway issue and message says Azure ?
Azure service bus is used for a gateway, so there is no problem here invoking Azure.
This gateway issue indicates that you didn’t configure the gateway in a right way or you didn’t start it when running the test. So the flow didn’t find the gateway.
Please make sure you keep the gateway online when running the test. Please don’t close it when you are running the test.
Please make sure you have installed an on-premises gateway and not a personal mode version, for more info about how to configure gateway, please go to the link:
On-premises data gateway - Power Automate | Microsoft Docs
Best Regards,
Community Support Team _ Kira Xie
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.