While I like the idea, I'm not sure about storing the drive information in a static field - you would be much better off declaring a class or struct in which to return results, using a generic List<> to store your instances, and return the data from there.

That way, you don't need the UNSAFE permission set, and achieve exactly the same thing.

Edit -> Ok, you still need UNSAFE because of the permissions required by the DriveInfo class, but I still wouldn't use a static 😀