Arq 是一款Mac上实用的系统网络备份工具，可以实时备份你的文件到Google Drive、Amazon S3、Microsoft OneDrive、任意SFTP服务器上，支持定时、增量备份等特性，非常不错！
Arq is super-easy online backup for the Mac. Back up to your own Google Drive storage (15GB free storage), your own Amazon Glacier ($.01/GB per month storage) or S3, or any SFTP server. Arq backs up and faithfully restores all the special metadata of Mac files that other products don't, including resource forks, ACLs, and creator codes.
Arq works like Time Machine, except you don't have to remember to plug in your external hard drive. Following the initial backup, Arq automatically makes incremental backups every hour, every day, uploading just the files that have changed since your last backup. Arq keeps hourly