CreateFile creates a new file at newpath, returning an error if newpath already exists.

DiskUsage returns disk usage of disk of path.

IsSpecialFSFromFileInfo determines if a file resides on a special file system (e.g.

MoveFileWithReplacement copies the file contents at `src` to `dst`.

RenameFile renames oldpath to newpath, returning an error if newpath already exists.

RenameFileWithReplacement will replace any existing file at newpath with the contents of oldpath.

SyncDir flushes any file renames to the filesystem.

DiskStatus is returned by DiskUsage.

A FileExistsError is returned when an operation cannot be completed due to a file already existing.