![]() And that's exactly the situation you want the other backup for. Even a minor corruption is likely to make it impossible to restore the backup of the backup to a functioning state. The time machine format is a little finicky, as it uses a lot of tricks to save space while allowing to recover to many different dates, like reducing the amounts of dates one can go back to regularly. It is probably wiser to not backup the time machine backup, but instead make another backup of the computer directly. I'm not about to trust anyone with everything. One thing that Arq got right is the end-to-end encryption, so any replacement should include end-to-end encryption. In case it's relevant for any reason, I have fiber, so the bandwidth is limited by the devices on both ends and any throttling the service does, rather than by the quantity of data pushed.) It can't depend on (e.g.) running rsync or Resilio Sync on the remote service. I'd like to have an efficient way to backup my Time Machine drive to a remote service. Many times I need to shut down my laptop before it completes. I don't know if I have ever seen it complete the backup. It gets through about 3400 GB (out of around 3600 GB) around the first day, then runs for days and days making virtually no progress, and then might at some point start to make some progress. There is a non-obvious downside, however: Arq really sucks for this use case, for reasons I don't understand. (The only obvious downside is that you must first restore the whole Time Machine backup if your Time Machine disk has died and you want to change cloud provider at the same time.) I used to enthusiastically recommend it to friends and family.) Backing up your Time Machine disk allows you to have a remote backup that you can move from one service to another without losing any history. (Since history is the whole purpose of a backup system, this is the one reason I no longer recommend Arq to anyone. For example if you signed up for Amazon's drive when it was $5 a year for unlimited space, and used it for your Arq backups, and then decided not to pay $120 a year for sufficient space for your backups when Amazon said "oh, just kidding!" and changed their prices, you're unable to move your backup history to another location. This may seem ridiculous, but it helps ameliorate a major problem with Arq: you can't move your remote backup from one service to another. I have been using both Arq and Time Machine for backup for years, but a year or so ago I got unlimited Google Drive space and decided to try making a remote backup (with Arq) of my Time Machine drive.
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