  Identifying quantum resources for quantum sensing is of paramount importance.
Up to date, two quantum resources has been widely recognized: the number $N$ of
entangled quantum probes and the coherent evolution time $T$. Here we identify
the spin quantum number $S$ of high-spin systems as another quantum resource,
which can improve the sensing precision of magnetic field according to the
Heisenberg scaling in the absence of noises. Similar to the case of $N$ and
$T$, the utility of $S$ may be degraded by environmental noises. We analyze
this point sysmatically under the Ornstein-Uhlenbeck noise (a prevalent noise
in realistic physical systems). We find that the utility of $S$ vanishes in
Markovian noises, but survives in non-Markovian noises, where it improves the
sensing precision according to the classical scaling $1/\sqrt{S}$.
Super-classical scaling can be achieved by suitable control of the high-spin
system.
