PNG tends to be the biggest of the three filetypes and isn't supported by some (usually older) browsers.
PNG趋向于三种文件格式中最大的，而且一些浏览器(一般老的)不支持。
2
As one last step, to show the power of the native file support and FileTypes in action together, create a file called example.jexx on the desktop, as in Figure 7.
If you discover that some files have not been copied over correctly or if symbolic links and other special filetypes are not copying properly, then you might want to try tar.