Bits are bits, and any hard disk pulled out of one computer and put into another can easily be read — unless that data is encrypted.

比特数据毕竟是比特数据，可以将硬盘从一台计算机中取出并放入到另一台计算机中，这样就可以很容易地读取其中的数据，除非对数据进行了加密处理。

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If you have room left over on the iPod after transferring your music, you can use it as a portable hard disk, manually copying any computer file to its hard disk to back up files or move them to another Mac.

WSJ: Apple Brings Flair To Its MP3 Player

The 4420 will also offer "random erase technology" that lets you use a CD-RW disc just like a floppy or hard disk -- adding or deleting individual files at any time.

CNN: Verbatim to ship first 4X CD-RW drive