It seems that if you invoke the 'Folder View' capability from the solution explorer, it starts to scan mysterious data (the folder structure I assume). Reason is not known.

However, following this discussion, I assume that Microsoft will fix this in the future release.

I did not find Scanning Data hinder any of my work, though it may slow down the PC a bit.

I'm guessing you opened the project as a "Folder", which will need to find and catalog all the files within the folder structure, including the massive "node_modules".

I "fixed" this by opening as "Web Site".

OK i think i have found the solution During installation pls uncheck the c++ things it can cause you trouble in cloning or Data scanning