You really need that because if you have only one copy of something, you don't have a backup; so, you can store the one copy separately.

你真的很需要这项发明,因为要是你只有一份的话，你就没有备份;,这样的话，你就可以将副本单独留存。

耶鲁公开课 - 金融市场课程节选

The product can work as a DLNA and iTunes server, but doesn't yet ship with any network backup software and -- unlike the Stora -- can't integrate with the built-in backup programs in Mac OS or Windows.

ENGADGET: Switched On: MyDitto NAS has some key issues

Backup and retrieval needs would grow exponentially, which meant the cost in labor hours would kill a company if it didn't have some kind of automated backup.

FORBES: Startup Beats Back Death

The machinery for track switches and motors on subway systems is often many decades old, and replacements aren't readily available when stores of backup parts have been used up as PATH's was after the storm.

WSJ: PATH's Road Back Is Rocky