All the major hard-disk makers sell external hard disks that connect to a PC either directly, or over a network, and which come with relatively simple backup programs.
所有主要的硬盘制造商都销售能够直接或是通过网络连接到个人电脑的外接硬盘，所带的备份程序也比较简单。
2
Many of today's corporate PCs are saddled with management, backup, and security agents that can bog down a PC.
如今的公司电脑搭载了大量管理、备份和安全软件，速度甚至要比蜗牛还慢。
3
Seven people counted on iTunes to do the backup for them, but a few were careful to also make sure their PC was backed up as well.