Both command creates folders. I read that MKDIR can create even subfolders.
Just aliases of the same command.Here are the help messages:
C:\>md /?
Creates a directory.
MKDIR [drive:]path
MD [drive:]path
and
C:\>mkdir /?
Creates a directory.
MKDIR [drive:]path
MD [drive:]path
If Command Extensions are enabled MKDIR changes as follows:
MKDIR creates any intermediate directories in the path, if needed.
For example, assume \a does not exist then:
mkdir \a\b\c\d
is the same as:
mkdir \a
chdir \a
mkdir b
chdir b
mkdir c
chdir c
mkdir d
which is what you would have to type if extensions were disabled.