Backing Up My Mac in 2020, Revisited

April 24, 2020 • 3:30 PM

Two months ago, I decided to give my Mac’s backup plans a serious look. I was gonna settle with Carbon Copy Cloner 5 with our Synology NAS, but found better options. Given that I’ve basically cruised around the internet and researched a lot of the options, I thought I’d summarize then up here for anyone who finds it useful.

A recap on my (scoped-up) requirements for backups:

I’ll show my setup first, as well as recommended setups for single-Mac scenarios. Then I will explain how I arrived at the recommendations. Backing up a computer really comes down to two components: software and storage. Let’s break them down.

The Final Setup

Single-Mac Setups

If you have just a Mac to back up, here are some options:

I’d recommend an onsite backup with external drive (any of the options above), plus a cloud option from either ArqBackup or Backblaze.

Backing up one single Mac.

My Multi-Mac + NAS Setup

Back to my situations: I’ve got two Macs to back up, a Synology NAS to back up, and preferably my Windows PC. Here’s my setup:

Backing up 2x MacBooks and one Synology NAS.

Cloud Storage Options

Let’s get storage out of the way first because it’s really simple: there is no storage that money can’t buy. Just pick the one that’s most cost-effective.

Almost all cloud storage providers have two kinds of cost: at-rest data storage cost, and per-use cost metred against API calls or data download. (Since we’re not building an app here and not calling APIs incessantly, we’ll just focus on download cost — for when disasters do strike and you need to re-download two computers’ worth of data.)

Here’s a chart of comparison:

Provider At-rest Storage Cost (US$/TB/year) Download Cost (US$/TB) Notes
Backblaze B2 60.0 10 Data can be mailed over; return for deposit.
Wasabi 82.8 0  
Amazon S3 Glacier Deep Archive 48.0 93 Charged to at least a year. 4 hours of delay before downloading is available. Cheapest image in US West.
Microsoft Azure 24.0 109 Charged to at least 180 days. $109 = $22 retrieval + $87 network. Cheapest image in Oregon.
Google Cloud Archive 48.0 120 Cheapest image in Oregon.

Personally, storage offerings from the “Big Three” — Microsoft Azure, Amazon AWS and Google Cloud — are out of the equation. Their storage is a bit cheaper, but comes with a long list of fine prints. The download costs for all three are prohibitive. If you think of backups as insurance, it’s not worth it to save a few bucks on tiny bit of premiums just to jack up your deductible by a whole lot.

The two smaller providers — Wasabi and Backblaze B2 — are more cost-effective for our purpose. Both pioneers of file storage service in their field, they don’t offer a suite of services as the Big Three do, but their file storage is solid. I prefer B2’s easy setup and their relative cheaper price. In the unfortunate event that I do need to download a terabyte of data, I’d gladly pay the 10 bucks. There are anecdotes about Wasabi being slightly faster than B2, but the article is dated, and B2’s speed is more than fine for me.

So the verdict on Cloud Storage is clear: go with Backblaze B2. Wasabi is a nice choice as well, and it may become the image host of this blog — who knows.

Software Options

Software is a bit more tricky: you can’t really buy “the perfect software” with money if it doesn’t exist. I’ve tried a few different options, and here is how they compare:

Solution Space History Incremental Backup Bootable Assumed Cost of Hardware (US$) Upfront Cost (US$) Cost per year paid monthly (US$) 1-year Cost for 1TB 3-year Cost for 1TB Notes
Time Machine Drive Permits, assuming 1TB Space Permits File Level No, but compatible with Recover Mode 60 0 0 60 60 Extremely unstable over the network.
Carbon Copy Cloner 5 Drive Permits, assuming 1TB Space Permits File Level Yes when attached 60 40 0 100 100  
SuperDuper! Free Drive Permits, assuming 1TB Space Permits None Yes when attached 60 0 0 60 60 Doesn’t remind you to back up your stuff.
SuperDuper! Drive Permits, assuming 1TB Space Permits File Level Yes when attached 60 28 0 88 88  
ArqBackup to attached/network drive Drive Permits, assuming 1TB Space Permits Block Level No 60 50 0 110 110 $90 upfront cost for 2-5 computers combined. Upfront cost waived when subscribed to ArqBackup Cloud
Backblaze Unlimited 30 Days File Level No 0 0 72 72 216 +$2 to extend history to 365 days, or extra for longer. Large amount of data can be mailed over in a drive.
ArqBackup Cloud 1 TB (plus pay-as-you-go extra) Space Permits Block Level No 0 0 72 72 216 Extra storage at US$5.9 per TB-month, prorated to GB-month.
ArqBackup to 3rd party Cloud Pay-as-you-go, assuming 1TB Space Permits Block Level No 0 50 60 110 230 $90 upfront cost for 2-5 computers combined. Upfront cost waived when subscribed to ArqBackup Cloud

The choice is entirely up to your desire:

As mentioned, I’m using Time Machine to back up my own Mac to an attached drive, ArqBackup to backup both of our Macs to our NAS, and to ArqBackup Cloud for both Macs and the Windows PC. ArqBackup turned up in my sight as kind of a surprise — it is one solution that handles backups both at home and in the cloud, for one affordable price.

Bonus Point: Synology NAS

Did I mention I wanted to back up the media in Synology?

Within the Synology app centre, there is a Cloud Sync app from Synology. It’s very much like a two-way sync app, just select your cloud storage provider and it syncs in the background. I’m using B2 due to it’s economical pricing and hassle-free setup.

With B2, I can set up a simple retention rule. Currently I’m keeping all versions of the file, as they are generally not updated anyway (most are video clips). This may change later.

And there’s really not much more to say.

See Also: Tools That Don’t Work

At the very end, I’m also listing the tools I’ve researched / tried that don’t work. But some of them may have limitations that don’t apply to your case and you may find them useful.

Time Machine over the network — Time Machine is very Apple: when it works, it works beautifully; when it doesn’t, there is absolutely nothing you can do. Here’s the dreaded message that you will see after a while:

Time Machine completed a verification of your backups on “NAS”. To improve reliability, Time Machine must create a new backup for you.

Click Start New Backup to create a new backup. This will remove your existing backup history. This could take several hours.

Click Back Up Later to be reminded tomorrow. Time Machine won’t perform backups during this time.

With Time Machine, I’ve tried connecting over AFP, SMB2 and SMB3. After a week or two, Time Machine will politely tell me that the backup can no longer be used, and a new backup must be created. If you say no to this, backups won’t continue; if you say yes, your backup history is tossed and you start fresh.

Thankfully, Time Machine never had a hiccup with my attached drive for 3 years.

ChronoSync — Reliable software with a good rep. Doesn’t support cheaper options of cloud storage such as B2 or Wasabi. Google Cloud and Amazon S3 (Select or Glacier) are available within the app, but as mentioned in Storage section, they cost you a fortune to download your data back. ChronoSync doesn’t support block-level incremental update, and you will need to create a mounted disk image to encrypt stuff. Not designed for backup purposes, ChronoSync doesn’t take advantage of new technologies such as APFS Snapshot.

Get Backup Pro — A relatively new software for US$20, it hasn’t built up rep yet. Supports no cloud storage options, and it is really slow. No support for APFS Snapshot. It didn’t end up my choice despite being included in my Setapp subscription. Goes to say how much I don’t like it.

To Sum It All Up

Backing up the Mac has no one-size-fits-all solutions. There are a few steps to follow:

  1. If you are not backing up anything, Time Machine or SuperDuper! to an attached drive is a solid step to begin
  2. Once you’re comfortable, use ArqBackup as a complete solution both at home and in the cloud
  3. Backblaze App is not a bad choice and dead simple to get started with, and may turn out to be a nice solution for you, too.

I hope my exploration over the two months can save you some headaches. You will gradually get to a robust file storage and backup system that you feel comfortable throwing stuff at.

Previously: Backing Up My Mac in 2020 — Feb 14, 2020

  1. Remember just before SSD and cloud storage caught on, every vendor was marketing laptops with 2TB or even 4TB storage? That was when Backblaze’s pricing made sense.