GiB vs GB

GibiByte (GiB) are based on base 2 and reflect the capacity more accurately (generally speaking).

\begin{align} 4\ \text{GiB} &= 4 \times 2^{10}\ \text{MiB} \\ &= 4 \times 1{,}024\ \text{MiB} \\ &= 4{,}096\ \text{MiB} \\ \\ &= 4 \times 2^{10} \times 2^{10}\ \text{KiB} \\ &= 4 \times 1{,}024 \times 1{,}024\ \text{KiB} \\ &= 4{,}194{,}304\ \text{KiB} \\ \\ &= 4 \times 2^{10} \times 2^{10} \times 2^{10}\ \text{Byte} \\ &= 4 \times 1{,}024 \times 1{,}024 \times 1{,}024\ \text{Byte} \\ &= 4{,}294{,}967{,}296\ \text{Byte} \\ \\ &= 4 \times 2^{10} \times 2^{10} \times 2^{10} \times 8\ \text{bit} \\ &= 4 \times 1{,}024 \times 1{,}024 \times 1{,}024 \times 8\ \text{bit} \\ &= 34{,}359{,}738{,}368\ \text{bit} \end{align}

GigaByte (GB) are based on base 10 and are often used for simplicity (easier to reason with).

\begin{align} 4\ \text{GB} &= 4 \times 10^{3}\ \text{MB} \\ &= 4 \times 1{,}000\ \text{MB} \\ &= 4{,}000\ \text{MB} \\[10pt] \\ &= 4 \times 10^{3} \times 10^{3}\ \text{KB} \\ &= 4 \times 1{,}000 \times 1{,}000\ \text{KB} \\ &= 4{,}000{,}000\ \text{KB} \\ \\ &= 4 \times 10^{3} \times 10^{3} \times 10^{3}\ \text{Byte} \\ &= 4 \times 1{,}000 \times 1{,}000 \times 1{,}000\ \text{Byte} \\ &= 4{,}000{,}000{,}000\ \text{Byte} \\ \\ &= 4 \times 10^{3} \times 10^{3} \times 10^{3} \times 8\ \text{bit} \\ &= 4 \times 1{,}000 \times 1{,}000 \times 1{,}000 \times 8\ \text{bit} \\ &= 32{,}000{,}000{,}000\ \text{bit} \end{align}