Cloud Backup Solutions

The 3-2-1 Rule Is the Only Backup Strategy You Can Actually Afford

Every ransomware incident you've read about this year shares one detail: the victim's "backup" was a second copy of the same data sitting on the same machine, or in the same cloud account, that got encrypted. The 3-2-1 rule — three copies of your data, on two different media types, with one copy offsite — exists precisely to break that pattern, and it's not expensive. The reason most teams and even small businesses skip it isn't cost; it's that nobody told them the free tier of a cloud provider plus a USB drive isn't a backup at all. A true offsite copy, in object storage you don't log into from the same workstation that processes your files, is what turns a disaster into an annoyance. This piece works backward from your actual data footprint to tell you which cloud backup product fits your budget, instead of the reverse.

What Counts as a Backup (and What Doesn't)

Let's be blunt about a few things that people call backups but that aren't. Syncing (Dropbox, Google Drive, OneDrive) replicates a deletion or a ransomware encryption across every device within seconds — so your "safety copy" is destroyed in tandem. Snapshots on the same cloud account can be deleted by anyone with access to that account, which is exactly what an attacker uses a compromised credential to do. A NAS in your office satisfies "two media types" but is on-premises, so a fire, flood, or a ransomer who encrypts your LAN takes it out too. A backup, strictly defined, is an offline or versioned, offsite copy that cannot be modified by the environment it's protecting. That definition is why object storage with object-lock (immutability) and versioning is the backbone of modern backup, and why "I have a cloud drive" is a category error.

The practical consequence: your baseline should be a combination of file-level backup to immutable object storage plus an encrypted, physically offline copy for true emergencies. Both are achievable on surprisingly small budgets, which the comparison below makes concrete.

The Comparative Table: What Each Tool Actually Costs

Notice how the pricing model fundamentally changes your decision. Wasabi and Cloudflare R2 kill egress fees — critical if you want to restore or move data, because AWS's $0.09/GB egress is where surprise bills come from. Backblaze B2 is the cheapest true object store at $6/TB and pairs beautifully with a free tier of a backup client. IDrive and Acronis are packaged backup products that bundle client software and management, which is worth real money if you don't want to wire a bunch of S3 buckets and retention policies yourself.

Build the 3-2-1 Setup That Matches Your Data Size

Here's a concrete recipe rather than abstract advice. Under 250GB (individual, freelancer): Keep local files on your machine (copy 1), sync a working copy to Google Drive free tier or a 2GB iCloud folder (copy 2, different provider from your email), and run an encrypted weekly backup to IDrive's cheapest plan or Wasabi's free trial bucket (copy 3, offsite). That's a genuine 3-2-1 on a free-to-$50/year budget, and you've crossed the line most people never do by having an immutable-ish offsite copy.

Between 250GB and 4TB (small business): Central storage on a Synology NAS with Btrfs snapshots (copy 1 on redundant disks), plus Backblaze B2 with object-lock as the offsite target (copy 2), plus a nightly versioned backup via Hyper Backup or Veeam (copy 3). Budget roughly $6/TB/month + NAS power — under $120/month for 4TB, which is a rounding error next to the cost of a single day of downtime. Add immutable buckets so even a stolen admin credential can't delete the offsite copy within the lock window.

Over 4TB or compliance-heavy: Layer in a dedicated backup server, longer retention, and a DR drill once a quarter. This is where data backup solutions at scale start to involve tape, cross-region replication, and documented restore tests. Whatever your size, the discipline that separates proper backups from theater is a scheduled, actually-executed restore test — most teams discover their "backup" is worthless the moment they need it.

Ransomware Is Why Immutability Isn't Optional Anymore

The backup product you choose should assume a worst case: an attacker who has compromised your workstation and possibly your cloud credentials. That assumption drives two non-negotiable features. First, object-lock / immutability (governance or compliance mode) so no account, even an admin, can delete or overwrite protected objects during the lock window. Backblaze B2, Wasabi, and Cloudflare R2 all support this, and it's the single feature that turns cloud storage into a real ransom defense. Second, versioning so every write creates a historical revision you can roll back to, even if the live file is encrypted. Acronis bundles anti-ransomware on top, actively blocking encryption at the filesystem level rather than only after the fact.

You also want your backup tool to live outside the blast radius: don't log into your backup console from the same machine that handles email, browsers, and document editing. A dedicated bastion or a password manager with a separate backup-account identity is enough. The goal is that even a full workstation compromise leaves an offsite, immutable, versioned copy intact — and that's precisely the outcome backup vendors are now marketing around, because it's the one that actually saves you.

Restore Speed and Testing: The Metric That Actually Matters

Everyone shops backup by price and storage; almost nobody shops by restore time objective (RTO). If you're backing up 3TB over a residential uplink, your weekly full backup might not finish, and your restore rate is capped by the same bolt. Test by restoring a single file, then a folder, then — quarterly — a whole virtual machine or a database, and time each one. If a full restore of your core systems takes three days, you don't have a backup strategy; you have an expensive data archive. Tools like Veeam and Acronis have "instant restore" and "sandbox restore" features precisely so you can verify a working recovery without bringing production down.

Keep a written runbook for restore: who triggers it, which bucket/tenant, what the credentials are, and how you verify data integrity. The most common real-world failure isn't missing backup software — it's that nobody knew the restore process when the moment came. Pair your backup layer with solid cloud tools for collaboration and this AI tools hub if you're automating ops on top of the same stack. For collaborative document workflows that also need backup protection, see and . And if you're a Chinese-language reader weighing your provider, read this guide to choosing cloud storage (云存储选择) in Chinese.

For more, check out: .

Frequently Asked Questions

Is Google Drive or Dropbox a backup, or just sync?

It's sync, not backup. Deletions and ransomware propagate to all connected devices almost instantly, and versions are subject to the account's grace period. Treat them as working storage, and keep a separate immutable offsite copy for real backup.

What free tier actually works for a small backup?

Wasabi's 1TB free trial and Cloudflare R2's 10GB free tier both allow immutable buckets. For a serious small-business copy, Backblaze B2 at $6/TB/month with a free backup client like Duplicati or restic gives you true offsite backup for a few dollars a month.

Why would I pay more for Wasabi when Backblaze is cheaper per TB?

Wasabi has no egress fees, so massive restores or data migrations don't rack up charges. If you expect to restore often or move data between regions, the egress savings can easily beat B2's lower base price. Choose based on your restore pattern, not just the price-per-TB line item.

How often should I actually test a restore?

Test a single file weekly, a full folder monthly, and a full virtual machine or database quarterly — and log the restore time each time. If your full-system restore exceeds a day, either your pipeline or your RTO target needs rethinking.