So, if you do not carry a USB drive on your keychain, these software programs should be encouragement enough to start.

所以，如果你的钥匙上还没有这样一个U盘，那么这些软件足以鼓动你去现在做一个。

youdao

Back it up, and copy it to a ZIP drive and USB keychain (just make sure it exists in several places and is clearly marked).

备份此版本，并将其复制到ZIP驱动器和USB设备上(只需确保它存在于几个位置并清楚标记)。

youdao

Anyone with a USB drive can carry his greatest works on a keychain.

FORBES: The Greatest Thinker You've Never Read: Ludwig von Mises