What is stored along this path? I only know that there is a file PhysicalDrive0 , which stores data on system startup.

1 answer 1

No folder \\\\.\\ exists. There is a prefix \\.\ (When written in string constants in C-like languages, the backslash doubles), which is used to pass the device name to the CreateFile function instead of the file name. For example, \\.\PhysicalDrive0 corresponds to a disk, \\.\COM1 to a serial port, and so on.

See Win32 Device Namespaces for details.