Backing up spotting photos: the 3-2-1 rule, NAS, cloud and what it costs

The memory card slips through the gap when you swap it at the fence, the external hard drive suddenly just clicks, or the backpack with the laptop is gone after the spotting trip. For aircraft photos this is especially bitter: the aircraft in the special livery, the rare guest at your home airport or the last picture of a type before retirement won’t come back exactly like that. A backup strategy for your spotting photos doesn’t have to be complicated – it only has to survive every single failure. This guide shows you the 3-2-1 rule, what NAS and cloud really deliver, how to calculate your storage needs and what costs to expect.

The short answer: 3-2-1

The proven rule of thumb for any data backup is 3-2-1: three copies, two media types, one copy off-site. It doesn’t come from photography, but has become the standard especially among photographers. The backup provider Backblaze roughly dates its spread to the late 2000s and points to a Carnegie Mellon University publication for US-CERT from 2012 that recommended the principle.

Translated for spotters:

• Copy 1 – working copy: the photos on your computer that you work with in Lightroom or Capture One (for comparison: Capture One, Lightroom and DxO).
• Copy 2 – local backup: an external hard drive or a NAS at home that updates automatically.
• Copy 3 – off-site: a cloud backup or a second hard drive that sits with family, friends or at the office.

By the way, the memory card does not count as a copy. It is a transport medium – and as soon as you format it, it is empty.

Why spotters need more backup than others

A vacation photographer comes home with a few hundred pictures. A spotter who works with burst shooting at the fence on a good day manages the same amount in an hour of approach traffic. Three particularities come on top:

• RAW files: If you shoot RAW for editing and photo portals, you generate many times the data volume of JPEGs. The trade-off is explained in the article RAW or JPEG for plane spotting.
• Unrepeatable subjects: Special liveries, ferry flights, diversions, last flights – you photograph much of it exactly once.
• Data hangs on photos: For many spotters the photo is the proof of the sighting. If the picture is lost, often the evidence for registration and date in your sighting logbook is missing too.

Then there is the risk on the road. Camera and laptop in the car at the spot are popular loot for thieves; tips on this are in the guide Protecting your photo gear.

What you need to protect against what

A strategy only makes sense if you know which failures it helps against. The following table shows why no single solution is enough:

Risk	External drive at home	NAS with RAID	Cloud sync folder	Versioned cloud backup
Failure of the computer’s hard drive	protects	protects	protects	protects
Failure of the backup medium	no	partly (one drive may fail)	protects	protects
Accidentally deleted	protects if versioned	only with snapshots or versions	only as long as the trash holds it	protects within the retention period
Ransomware	only if the drive is unplugged	only with snapshots or versions	usually not, changes are mirrored	protects within the retention period
Theft, fire, water	no	no	protects	protects

Two mnemonics are in there. RAID is not a backup: mirrored drives in the NAS keep operation going when a drive fails – but they carry out a delete command on both drives at the same time. Sync is not a backup: a folder that is synchronized with the cloud transfers mistakes and deletions too.

Calculating storage needs

Before you buy drives or cloud plans, do the math once. Three numbers are enough: how many photos you take per spotting day, on how many days a year you are out and how big a file is on average. The easiest way to see the average file size is to divide the folder of a typical day by the number of images.

The most effective lever here is not bigger storage but culling. If you keep only the three best from a series of twenty almost identical pictures of a landing, you reduce the need drastically. How to do this quickly and consistently is shown in the guide Culling photos quickly.

The building blocks at a glance

External hard drive or SSD

The simplest and cheapest form of local backup. Classic hard drives offer lots of capacity per euro, external SSDs are sturdier in transport and faster. The backup tools of the operating systems – Time Machine on the Mac, File History on Windows – or dedicated backup software back up automatically and with versions.

Important: a drive that is permanently attached to the computer shares many risks with it, such as power surges or malware. A second drive that you swap regularly with the first and store in a different place, on the other hand, already fulfills the “1” part of the rule – entirely without the cloud.

NAS: storage for the archive

A NAS (network attached storage) is a small network storage device with its own hard drives. For spotters with large archives it has two advantages: it grows with you, and it can run backups itself. Software like Synology’s Hyper Backup, according to the manufacturer, backs up folders to USB drives, a second NAS, rsync servers or cloud storage, including incremental versions and deduplication.

Typical setup: the NAS holds the photo archive or a backup of the computer, snapshots protect against accidental deletion and ransomware, and a nightly task additionally pushes the data into cloud storage. That gives you all three copies, and after setup you hardly have to intervene.

Cloud: the copy off-site

The cloud is the most convenient way to the third copy because it works without swapping drives. Roughly, there are three variants:

• Storage plans from the platform providers like iCloud+, Google One or OneDrive: simple, often already in use, but with fixed capacity tiers and primarily meant as synchronization.
• Backup services for private users like Backblaze Personal Backup: according to the provider, back up unlimited amounts of data from the computer and connected external drives, with version history.
• Object storage like Backblaze B2, Amazon S3 or European providers like Hetzner’s Storage Box with locations in Germany or Finland: billed per terabyte, ideal as a target for NAS or backup software.

With every cloud, pay attention to two points: how quickly do you get several hundred gigabytes back in an emergency, and where are the servers? Especially with large archives, the first upload over a normal home connection easily takes days to weeks – plan for it and let it run overnight.

What does a photo backup cost?

The one-time costs for drives or a NAS depend heavily on capacity and market and fluctuate constantly. For the ongoing costs, it is worth a look at the providers’ pricing pages. The following values come from there, as of October 2026 – check them before signing up, prices and plan names change regularly.

Offer	Capacity	Price according to the provider	Suitability for spotters
iCloud+	2 TB / 6 TB / 12 TB	€9.99 / €29.99 / €59.99 per month	convenient in the Apple ecosystem, but primarily sync
Google One	several tiers from 2 TB	tiered monthly plans, partly bundled with AI features – check the current price with the provider	convenient in the Google ecosystem, but primarily sync
Backblaze Personal Backup	unlimited	$99 per year	real computer backup including external drives
Backblaze B2	pay as you go	from $6.95 per TB per month	target for NAS and backup software

A rough comparison: with an archive of two terabytes, the fixed storage plans and object storage are in a similar range. If your archive keeps growing, per-terabyte billing becomes more flexible, while fixed plans jump in steps. An unlimited computer backup is attractive in price, but assumes that your data sits on the computer or a connected drive – it is not intended for a pure NAS archive.

How backup costs fit into the overall budget of the hobby is shown in the overview What does plane spotting cost?.

Three setups for three types of spotters

The routine after every spotting day

The best technology is useless if the memory card is formatted before the backup. A fixed order takes the decision off your hands:

One detail that is often forgotten: keywords, registrations and ratings are best saved in the files themselves or in XMP sidecar files, not only in the photo management catalog. Otherwise you back up the pictures, but not the work that went into labeling them. How this works is explained in the guide Metadata for aircraft photos. And back up the catalog itself too – in the Lightroom workflow for aircraft photos, all of the editing is in there.

On the road on a spotting trip

On trips to unfamiliar airports, stricter rules apply, because computer, camera and cards are often in the same backpack. These have proven themselves:

• Two copies on two devices: In the evening, copy photos to the laptop and a small external SSD and store the two separately – for example SSD in the hotel room, laptop in your luggage.
• Don’t reuse cards: Take enough memory cards so that you don’t have to format any on the road. Full cards are your third copy until you get home.
• Be realistic about hotel Wi-Fi: A cloud upload of hundreds of RAW files often fails because of slow connections. If needed, upload only the most important pictures.
• Know the legal situations: In some countries there can be trouble over photos at airports. What applies if the camera or card is confiscated is described in the article Camera or memory card confiscated.

What to watch out for

• Test the restore: Twice a year, bring back a few random files from each backup and open them. Only then do you know it works.
• Media age: Even if the annual failure rate seems low – Backblaze reported around 1.36 percent for the evaluated data center hard drives in 2025 –, every drive fails once over the years. Replace old backup drives in time.
• Use encryption: A backup drive that sits with acquaintances, or data in the cloud, is best encrypted. The password then belongs in a safe place outside the computer.
• Don’t just back up photos: Sighting lists, spreadsheets and catalogs are often more valuable than individual pictures. Put them in the same backup plan.
• Turn on notifications: Have yourself notified by email when a backup fails. A silently failed backup otherwise only shows up in an emergency.

Conclusion

A good photo backup for spotters is not a technology project but a habit with three building blocks: working copy, local backup with versions and a copy off-site. Whether you use a second hard drive with the family, a NAS with a cloud connection or an unlimited computer backup depends on archive size and appetite for technology. Calculate your needs, cull consistently, automate as much as possible – and test the restore before you need it.