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 si more...

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 backups for the past 24 hours, daily backups for the past month, and weekly backups for everything older than a month.

Arq lets you set a budget for S3 storage, and it automatically drops the oldest backups to keep within the budget.

Arq backs up everything with no limits. It backs up files of any size, external drives, and network drives.

Arq "de-duplicates" your backups, never storing the same file twice in your S3 account.