為了weekly FAQ....我再OP一下好了= =

最完整的算法：
1KB=1,024 Bytes
1MB=1,024 KBytes=1,048,576 Bytes
1GB=1,024 MBytes=1,048,576 KBytes=1,073,741,824 Bytes
1TB=1,024 GBytes=1,048,576 MBytes=1,073,471,824 KBytes=1,099,511,627,776 Bytes

硬碟廠商都以1=1000做為進位
160GB，姑且不論尾數
160,000,000,000÷1,073,741,824=149.012 GBytes