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 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 compresses and "de-duplicates" your backups, never storing the same file twice in the cloud. Arq encrypts all your backups with a password that never leaves your computer, so no one can read your cloud backups.

You can back up to multiple "targets". Back up some files to Glacier, some to S3, some to an SFTP server, etc. You can also back up to Amazon, GreenQloud, DreamObjects, Google Cloud Storage, or any other S3-compatible service.

Take control of your Mac's backups with Arq!

What's New v4.9.2
New Features
Added error logging for the case where SFTP init fails.
Fixed Bugs
Reduced the number of API calls when backing up to Dropbox.
Fixed an issue where data validation for Dropbox mistakenly thinks no objects exist at Dropbox.
Set cache policy to ignore when loading XML update-spec, to avoid erroneous "Update available" messages.
Removed the check for free space on SFTP server because most SFTP servers don't support the API call.

Requirements
Intel, 64-bit processor
OS X 10.7 or later

Homepage - http://www.haystacksoftware.com/arq/

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