give the ASP.NET process permission to write to the server's hard drive

The project I am working on: Make a backup copy of a file using the FileStream class. I want to give the ASP.NET process permission to write to the server's hard drive. I need to follow these steps to accomplish this -->On my Web Server Computer -->Launch Windows Explorer -->Locate the folder that contains my Web Site (under wwwroot folder Am I right?) -->Right-Click on Folder -->Select Properties -->Click On Security tab -->Click the Add Button -->Select the ASPNET user from the local computer. -->Click ADD and then OK. QUESTION: When I Right-Click on Folder and select Properties. I see the following tabs. -->General -->Sharing -->Web Sharing -->Custamize Please could someone tell me why I am not being able to see the Security tab. How can I give the ASP.NET process permission to write to the server's hard drive? Is there any alternative way where I can make this change? Please could someone give me exact steps as to what can be done. I need to submit my project in two days. I would be greatful if someone could help me with a solution soon. Thank you Sush