  In this paper, we consider an axially symmetric $(2+1)-$dimensional rotating
Banados-Teitelboim-Zanelli (BTZ) black hole to investigate its interior
\textbf{information}. First, we choose a largest space-like hyper-surface at
$r_v=0.45$ and calculate the maximal interior volume bound by it. We found the
interior volume to increase with advance time $v$. Similarly, the
\textbf{scalar} quantum mode entropy \textbf{is} also found to increase with
advance time. Next\textbf{,} considering two important assumptions, an
evolution relation is obtained between \textbf{the variation of scalar} quantum
mode entropy and Bekenstein Hawking entropy \textbf{for an} infinitesimal
interval of time. In contrast to the evolution relation of higher dimensional
black holes, the characteristic feature of this relation is its increase with
extremely large increase in black hole mass. Moreover, this work extends the
notion of black hole evaporation idea to lower space-time dimensions.
