5s难道都是盒子上写的16G实际是12G?

求解

12.9

16GB×1000 = 16,000MB×1000 = 16,000,000KB×1000 = 16,000,000,000字节
16,000,000,000字节→ 16000000000÷1024 = 15625000KB÷1024 = 15258MB÷1024 = 14.9GB
实际容量14.9G，再加上系统占用。