Cloud Backup vs Local Backup

Over the past 5–10 years, the amount of data created by personal devices has grown significantly. One of the main drivers of that growth is photos. According to estimates from Rise Above Research, by 2030 the number of photos taken worldwide each year will approach 2.5 trillion.

Smartphones have played the leading role in this growth. While a dedicated camera used to be necessary for high-resolution, high-quality shots, today practically any modern smartphone can handle that job.

That said, storing photos and videos only in your phone's memory is risky. First, its storage is limited, so sooner or later you need to free up space, and important shots can get accidentally deleted during that cleanup. Second, no one is immune to a device being stolen, lost, or breaking down.

So alongside the ability to take great photos comes the question of choosing a reliable way to keep them safe. The safest option remains regularly creating backups and storing them separately from the originals. But that raises the next question: what should you use to store a photo archive — cloud services or local storage?

Key Differences Between Cloud Services and Local Storage

Cloud storage is a broad term that covers both data-sync services and backup services. Users often confuse the two, which can sometimes lead to the loss of entire photo-archive folders, not just individual photos.

Cloud sync services are built to provide continuous access to files across different devices and a central cloud storage location. When you use them, any local change — including edits or deletions — is instantly propagated to every connected client and to the cloud. This is how cloud storage services like Google Drive and OneDrive work.

Cloud backup is a one-directional process that creates isolated, unmodifiable point-in-time copies of selected files or folders. Changes made in your working environment don't instantly overwrite the reference backup; instead, they're kept as a chain of versions that's completely isolated from direct user access through your operating system's regular file explorer. This is mainly how dedicated services like Backblaze work.

Which specific type of cloud storage to choose depends directly on your goals. For example, professional photographers who need not just to upload shots but also to access and edit them are better served by a sync option. But for home photo archives, where safekeeping matters more, it's better to choose a cloud backup service.

Local backup gives you full physical control over your storage media. Data is transferred to an external SSD/HDD via USB, Thunderbolt, or SATA, or to network-attached storage (NAS) over a local network (LAN, Wi-Fi).

Using local storage keeps you independent from third-party service providers and an internet connection, which guarantees full privacy, since no one but you can access your photo or video archive.

Weighing the Pros and Cons of Cloud and Local Storage

The trouble with choosing between cloud backup and local backup is that there's no single right answer. In both cases, you can't get a system that's both fully autonomous and completely maintenance-free, without any compromises or technical limitations.

The Characteristics of Cloud Backup

From a data-safety standpoint, the main advantage of cloud photo backup is geographic distribution. Once uploaded to a provider's server, your shots are physically removed from your place of residence. This completely eliminates the risk of losing them to theft, fire, flooding, or a local natural disaster.

On top of that, cloud services have enough resources to back up user data on a regular basis. Doing something similar on your own at home would be expensive and technically challenging. In fact, the only thing that could really cause you to lose access to your photos in the cloud is losing your own account. Yes, force-majeure events happen at data centers too, but the odds of that are much lower compared to an ordinary home.

At the same time, you aren't tied to a specific location or network to access your backups. The cloud provides cross-platform remote access from anywhere in the world via a mobile app or web interface.

That said, using cloud services does have downsides. First, the speed of data recovery depends on your internet provider's upload and download bandwidth. If you can get a plan with 1 Gbps or more, great. Otherwise, restoring several terabytes of data can take days or even weeks.

On top of the speed dependency, there are also quotas on how much data you can transfer. And not all cloud storage providers spell these out clearly in their plans. Google, for example, buries this important information deep in its documentation.

As a result, you can't upload or download a huge amount of data all at once. For example, transferring 2 TB to or from Google Drive will take three days, since there's a quota of 750 GB every 24 hours.

But the biggest drawback of cloud backup is cost, which can grow faster than the volume of data you're storing.

The Characteristics of Local Backup

Local storage has no artificial limits on speed or quotas. Restoring a 1 TB backup over USB 3.2 Gen 2 or a 2.5 GbE local network takes minimal time. And a local network-attached storage device (NAS) can double as more than just a backup server — it can also work as a personal media server, a standalone download station, or a video surveillance server.

The price of that independence is hardware vulnerability. Keeping your original photo archive and its backup in the same location creates a single point of failure in case of fire or flooding. On top of that, you'll have to set up RAID arrays, file systems, firewall rules, and network protocols yourself. You'll also need to keep maintaining the hardware, monitor hard-drive S.M.A.R.T. metrics, replace failing components in time, and update the software. That takes deep technical knowledge of networking hardware and specialized software.

Total Cost of Ownership: Cloud vs. Local Storage for Photo Backups

Despite the technical hurdles involved, at first glance it might seem like local backup is cheaper than cloud backup: buy the hardware once, and use it for years. In practice, though, using your own hardware isn't always the more cost-effective choice. To make an informed decision, it's worth calculating the total cost of ownership for each option.

Using cloud storage comes with a single recurring cost: the monthly subscription fee.

The cost formula is simple: the more cloud storage you have and the longer you keep the subscription, the higher the cost of storing each individual photo becomes. For example, 3 years of Google One (AI Pro) will cost nearly $300.

To understand whether that's a lot or a little, it helps to compare the total cost of ownership of cloud storage with local storage for photo backups. For a basic scenario of up to 2 TB, for instance, a Google One or iCloud+ subscription runs about $100–$120 a year. If, instead of the cloud, you buy a 4 TB external hard drive for $110, it pays for itself within the first year of use. That said, keep in mind that functionally, a drive like that is really just a very large flash drive. To back up photos from a smartphone, you'd need to specifically connect the external hard drive via cable and only then copy the files, or use a computer instead. Either way, everything has to be done manually or you'll need to find tools to automate it.

To get functionality closer to a full-fledged cloud storage service, you'd need to set up a two-bay NAS (a Synology DS224+ with two 2 TB drives in RAID 1). The total hardware cost comes to $430–470, and it only pays for itself after about 4 years. That's without factoring in the electricity cost of running the NAS around the clock (roughly $30–60/year).

Advanced users, such as photographers or video creators, will find 2 TB isn't enough for backups. We're talking about volumes of 5–8 TB here, which pushes the cost of local storage up to about $960. Looking at cloud services with a comparable amount of storage, there's the Apple iCloud+ 6 TB plan ($359.88/year). In that case, the NAS would pay for itself in under 3 years.

Looking at local versus cloud storage for backups of 10–12 TB or more, the local option pays for itself even sooner. For example, a full 4-bay NAS system like the Synology DS423+ with three 8 TB drives in RAID 5, giving 16 TB of usable capacity, costs about $1,390. Meanwhile, a comparable cloud subscription would run anywhere from $700 to $1,200/year. Factoring in hard-drive wear and the need to refresh hardware every 5–7 years, a NAS still provides a noticeable financial advantage over subscriptions.

In the end, the cloud is most cost-effective at volumes up to 2 TB. A NAS starts to reliably beat cloud subscriptions on price only once you consistently exceed 8–10 TB of usable data.

Independent Backup Without Being Locked Into an Ecosystem

Cloud storage and off-the-shelf NAS devices offer convenient tools for organizing a home photo archive. But that convenience comes at a cost — not just in money, but also in a certain amount of dependency on the manufacturer's software ecosystem.

With cloud services, that can mean a recurring subscription fee, plan limitations, and having to work within a specific platform's rules. NAS manufacturers, for their part, offer their own software that makes setting up automatic backups easier, but it can also tie you to a particular infrastructure and set of tools.

A good example is the face recognition feature found in Google Photos, Apple Photos, and Synology Photos. In all three, it genuinely works well, making it much easier to find friends and family in a photo archive. The trouble starts when you need to switch cloud services or move to hardware from a different vendor, since the tags for recognized faces aren't written into the photos' metadata — they're kept in an internal database. As a result, when you migrate your photo archive, all those tags get automatically lost, and you'll need to spend extra time re-creating them by hand.

That said, you don't need the cloud or a dedicated network storage device just to keep your smartphone photos safe. In many cases, an ordinary computer, an external drive, and a program that automates file transfer between devices are all you need.

This approach lets you control where your photo archive is stored, choose your own hardware, and change your software without having to rebuild your entire storage system from scratch.

Let's look at two tools that help with exactly this: TonfotosSync, for transferring photos from a smartphone to a home photo archive, and Syncthing, for syncing files between devices.

Using TonfotosSync to Back Up Photos from a Smartphone

TonfotosSync isn't a standalone app for backing up smartphone photos — it's the mobile component of the Tonfotos photo manager. It handles the connection between your phone and computer and transfers photos from one device to the other.

To take full advantage of this software pair, you'll need to install the matching apps on your computer and smartphone and go through the initial setup.

The first step is to prepare the main folder where photos from your smartphone will be backed up inside Tonfotos. Remove all the suggested folders and add an empty one on the appropriate drive on your computer instead.

The program works strictly locally, so it's important that both devices are on the same local network (Wi-Fi/LAN) during syncing and any later backups.

Once TonfotosSync is installed, you can move on to connecting the devices: click "File" in the main menu, then select "Connect Smartphone."

On the phone, in turn, scan the QR code that appears.

Since this is a direct connection between the smartphone and computer, with no external servers involved, the process takes just a few seconds. You'll know everything worked correctly when the phone shows a prompt to back up your photos, along with the total amount of data that needs to be transferred. On later runs, TonfotosSync will show how many photos have already been synced. If you don't want to open the app every time, you can set up automatic backup by turning on the corresponding option in settings.

Tonfotos doesn't just copy photos into a chosen folder on an internal or external drive — it automatically builds a hierarchical folder structure, organized by the date each photo was taken.

It's worth noting that the program's capabilities aren't limited to just building a folder structure. Once photos are transferred to the computer, Tonfotos offers additional tools that help you get rid of unnecessary files, find the photos you need faster, and organize your family photos.

• Duplicate search and archive cleanup. Tonfotos can find duplicate photos, so you can review the matches and delete the copies you don't need.

• Search by location. If your photos contain GPS coordinates, the program can plot them on a map. This helps you not only pinpoint where a specific shot was taken, but also see which cities and countries the photos in your home archive came from.

• Creating themed albums. You can create separate albums for family celebrations, vacations, home renovations, pets, or other important events. This lets you group photos by meaning, even if they're stored in different folders and were taken in different years.

• Face recognition and person cards. A built-in algorithm detects and groups photos that feature the same person. For each group, you can create a person card and add not just a first and last name, but other biographical details and family relationships as well.

As a result, Tonfotos doesn't just help preserve your photos after backing them up from a smartphone — it gradually turns scattered files into a convenient, well-organized home photo archive.

Syncthing as a Tool for Local File and Photo Backups

Syncthing is a free, open-source program for syncing files between computers, smartphones, and other devices. Unlike Google Drive or OneDrive, it doesn't require storing your files on a third-party provider's server. Devices can transfer data directly to each other over a local network.

Syncthing's main strength is its versatility. The program works not only for transferring photos from a smartphone, but also for documents, work projects, design source files, article drafts, and other files. You choose which folders to share and which devices they're stored on.

By default, though, Syncthing is set up for syncing, not backup. If you simply connect two devices, accidentally deleting a photo on one will cause it to be lost on the other as well. So to use it for backups, you need to do some configuration first.

Setting Up Syncthing for Backups

Start by installing Syncthing on the devices you want to transfer data between. On computers, the program is available for all the major operating systems. Phones are trickier, since the developers don't ship an official client. You'll need to find a separate compatible solution for each platform. For example, on Android there's the Syncthing-Fork client, and on iOS there's Möbius Sync, Sync Anything, and others.

After launching the program, you'll need to pair the devices with each other. Syncthing uses unique device IDs, and a connection has to be confirmed by the user. You can do this by scanning a QR code or sharing the ID some other way. Once confirmed, the devices can exchange files according to the rules you set.

The next step is choosing which folders to sync. On a smartphone, for example, that might be the camera's photo folder, while on a computer it could be a dedicated folder for storing them. You can set up document transfers, work projects, and other data the same way.

It's worth paying attention to the folder type, which determines the direction files are transferred in:

• Send & Receive. Changes are transferred both ways. This mode works for work documents that get edited on multiple devices, but on its own it doesn't protect against accidental deletion.

• Send Only. The device acts as the data source and sends changes to other participants. This mode works best for sending photos from a smartphone.

• Receive Only. The device receives files but doesn't send its own changes back. This is the mode to use for the computer acting as the backup destination.

That said, this setting alone isn't enough for a proper backup. If photos are deleted on the source device, that deletion can also propagate during the sync process. So you'll need to set up versioning as well.

Automation and Limitations

After the initial setup, Syncthing runs in the background and watches for changes in the folders you've selected. New files are transferred automatically, and re-transferring already-synced data only happens when a change is detected — and even then, only the necessary blocks of the edited files are sent.

Devices don't need to be on the same local network to exchange data. If needed, Syncthing can connect devices over the internet using its own discovery and connection-establishment mechanisms, and it falls back to relay servers when a direct connection isn't possible. All transferred files are protected with encryption.

So Syncthing can be thought of as a versatile tool for setting up local file sharing and automated backups without a recurring cloud subscription fee. It's especially handy for anyone who needs to sync photos, documents, and work projects across several computers.

What to Choose for Backing Up a Home Photo Archive

When choosing how to store your photos, it's worth paying attention not just to the cost of a subscription or local-storage hardware, but also to how easily you'll be able to restore your archive after losing a device, accidentally deleting a photo, or running into some other unexpected situation. On top of that, backups should happen automatically. A system that demands constant attention won't reliably protect your data.

For most home users, local storage with automated photo transfer to a computer or external drive is more than enough. This option avoids ongoing subscription costs and keeps you in control of your files. If your photo archive is especially valuable, though, don't settle for a single backup kept on the same device or in the same location as the originals. An extra copy in the cloud, or on a separate drive stored somewhere else, will significantly lower the risk of permanently losing your photos.