Newcomer questions~VSCode Unable to write file ?

[ZeroOne]

I want to add some new annotations to this stm32f429xx.h to help me understand, but VSCode tells me that I cannot "write to files", so what should I do to make vscode write successfully？

[Tesla DeLorean]

Change file attributes at a file system level?​

[ZeroOne]

I tried. It didn't work.:face_with_tears_of_joy:

[Tesla DeLorean]

Is this a network drive or virtual drive?

Some AV software preventing file access or writes?

This really isn't a VSCode centric forum