$.$ In a particular memory, it takes one hour to store $1$ gigabyte of data. What is the approx$-$ imate bandwidth of the memory in megabits per second?A$\mathrm{.}0\mathrm{.}3$ B$\mathrm{.}50$ C$\mathrm{.}2$ D$\mathrm{.}0\mathrm{.}03$