If you've downloaded an ISO file, you'll need to mount it as a virtual drive. You can use tools like WinCDEmu or Daemon Tools to mount the ISO file.
Here is a command that includes the most common workloads for a robust offline install: how to install visual studio offline
After running the tool, the user gets:
Installing Visual Studio on a machine without internet access requires a two-step process: first, using an online computer to download the necessary files into a , and second, transferring those files to the offline machine for installation . Step 1: Create the Local Layout (Online) If you've downloaded an ISO file, you'll need