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Backups & Storage · Beginner explainer

Cloud backup vs local backup: when each one wins

Choosing between cloud backup and a local backup at home feels like a fork in the road, but for almost every household the answer is both — and which one matters more depends on what just went wrong. This page walks through what each kind actually does, real 2026 pricing, how long they take when it counts, and how to combine them so a failed drive, a stolen laptop, or a ransomware infection all have a working answer.

The mental model

A local backup is your sock drawer — right there, instant access, you can grab a pair in five seconds. A cloud backup is your safety deposit box at the bank — slower to get to, costs a little money, but it survives the house burning down.

  • You want clean socks for everyday life — that's local backup for accidental deletes, drive failures, and "undo that overwrite from yesterday."
  • You want the safety deposit box the day after the fire — that's cloud backup for ransomware, theft, flood, lightning, and the house itself.
  • Picking one over the other is choosing which disaster to be unprepared for. Most homes want both, and the combined bill is usually under $200/year.

Words you will see

Local backup
A copy of your data kept inside your house: a NAS, an external USB drive, a second internal drive. Restores at LAN speed (minutes), but dies in the same fire/flood/theft as the original.
Cloud backup
A copy of your data kept by a paid service in someone else's data center. Restores at internet-download speed (hours to days), but survives anything that happens to your house.
Egress fees
What some cloud providers charge to download data back out. AWS S3 Glacier and the cheapest tiers can charge $50-100+ to restore a terabyte. Wasabi and Backblaze B2 (within fair-use ratios) charge $0 egress.
Immutable / Object Lock
A backup the provider will refuse to delete or overwrite for a set retention window — even if ransomware or a thief has your password. The 2026 standard for ransomware-safe cloud backup.
End-to-end encrypted (E2EE)
Your data is encrypted on your machine before it leaves, with a key only you hold. Even the cloud provider's staff cannot read it. Trade-off: if you lose the key, the backup is unrecoverable.
Initial seed
The very first cloud backup, which usually transfers your entire library (hundreds of GB to several TB). Painful once, then forgettable.
Restore window
How long it takes to actually get your data back. The number nobody checks until the bad day arrives.

What each kind is best at

**Local backup wins on speed.** Restoring 500 GB from a NAS over gigabit Ethernet takes 8-15 minutes. Restoring the same 500 GB from cloud over a 100 Mbps home connection takes about 11 hours. For everyday "I deleted the wrong folder" or "my laptop won't boot," local backup is the right tool.

**Cloud backup wins on disaster scope.** Fire, flood, lightning, theft, and ransomware all kill local copies — usually at the same time. The cloud copy is unaffected because it is somewhere else. The whole point is the offsite-ness.

The 2026 price reality

**Per-machine flat-rate consumer plans**:

Backblaze Personal Backup: $99/year, unlimited per computer, 30-day version history. iDrive Personal: ~$99.75 first year for 10 TB across all devices (renews ~$199.50). Carbonite Safe Basic: ~$84/year for one computer.

**Pay-per-TB object storage** (used by NAS-to-cloud workflows):

Backblaze B2: $6/TB/month, $0 egress (within fair-use ratio), Object Lock included free. Wasabi: ~$7/TB/month, $0 egress within a 1:1 egress-to-storage ratio (starting July 2026, $7.99/TB), 1 TB minimum. Synology C2 Backup: ~$60/year for 100 GB tier; capacity-priced tiers run $9.99-$49.99/month.

**AWS S3 Glacier Deep Archive**: ~$1/TB/month but $90/TB egress to download and 12-48 hour wait to restore. Only worth it if you genuinely hope to never touch the data again.

Speed numbers nobody warns you about

**Initial seed of 4 TB on a typical 50 Mbps home upload**: about 7-8 days of continuous upload. Run it overnight, accept that the first week is slow, then incremental backups are tiny.

**Restoring 500 GB from cloud on 100 Mbps**: ~11 hours. From a NAS on gigabit LAN: ~8-15 minutes.

**Restoring 500 GB from S3 Glacier Deep Archive**: 12-48 hours just to thaw, then 11+ hours to download, plus a ~$45 egress bill.

This is the practical reason a household wants both layers. The cloud is the lifeboat, not the daily ride.

Encryption, ransomware, and immutable copies

Three things to look for in 2026:

**Encryption in transit and at rest** — table stakes; every reputable provider has this.

**End-to-end encryption with a personal key** — your data is encrypted on your machine, the provider cannot read it. Backblaze Personal offers this as an option; restic, Arq, and Duplicacy do it by default when backing up to B2/Wasabi/S3. **Warning**: lose the key and the backup is unrecoverable. Write it down in two safe places.

**Immutable / Object Lock** — turn this on for the NAS-to-cloud copy. Even if ransomware steals your B2 credentials and your laptop, it cannot delete or encrypt the locked objects until the retention window expires.

The right answer for a household: both

The household 3-2-1 stack:

**Local**: NAS (Synology, QNAP, TrueNAS, Unraid) or external USB drive. Restores everyday mistakes in minutes.

**Cloud**: Backblaze Personal for each laptop; Backblaze B2 or Wasabi with Object Lock for the NAS itself. Survives fire/theft/ransomware.

Pick the cheapest combination that actually meets the test. If the local backup costs $0 because you already own an external drive, the only real bill is Backblaze Personal at $99/year per laptop plus a few dollars a month for the NAS-to-cloud tier. For most families, the entire offsite layer is under $200/year.

Common misconceptions

Many people think: Cloud is automatically safer than local.

Actually: Cloud is safer against your house (fire, theft, flood). Local is safer against the cloud provider (account lockout, billing failure, vendor outage). Each protects against what the other is exposed to — that is why you want both.

Many people think: Local backup is fast, so I do not need cloud.

Actually: Local backup dies in the same fire as the original. If the house burns down, "fast" is irrelevant because there is nothing to restore from.

Many people think: Free tiers (iCloud 5 GB, Google 15 GB, Dropbox 2 GB) are enough.

Actually: Those are sync, not backup, and the capacity is far below a real photo library or laptop. A modern phone alone can fill 5 GB in a long weekend.

Many people think: End-to-end encryption means the cloud provider can recover my backup if I forget the password.

Actually: That is exactly the opposite — E2EE means the provider cannot recover it. The whole point is that only you hold the key. Write the recovery key down in two physical locations or do not turn E2EE on.

Many people think: AWS S3 Glacier is the cheapest option, so I should use it.

Actually: $1/TB/month storage looks great until you need to restore. Then $90/TB egress fees plus 12-48 hour retrieval delays land on the same bill. For a household, Backblaze B2 or Wasabi (both ~$6-7/TB with $0 egress) wins almost every comparison.

Ready to actually fix it?

Pick the layers and turn them on — the planning tools and runbooks are ready:

Last reviewed

2026-05-27