You can set the backups to occur either weekly or daily, and you can get email digests of backup activity.
你可以设定每周或每天备份一次，还可以得到备份活动的邮件摘要。
For the last two, carry a backup of your presentation on a USB flash drive or email yourself a copy, or better yet, do both.
对于后两种情况，使用移动硬盘上备用文档或从邮箱中调一份，或有更好的方法，都行。
Backup has been updated to include now email account Settings that you setup yourself.
备份已更新，包括现在的电子邮件帐户设定你自己安装。
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