For most people, the only copy of most of their photographs lives on a device that goes in a pocket, near water, and gets dropped. Automatic backup exists to fix that, and its settings deserve five minutes of attention rather than the zero they usually get.
How it works
A backup app watches the camera roll and uploads new photos in the background. Once a photo is stored elsewhere, the phone is no longer the only copy.
The implementation details vary, but the settings that matter are consistent across every app, and the defaults are rarely the ones you would choose.
The five settings worth checking
Wi-Fi only, or mobile data too?
Wi-Fi only is the common default and has an obvious failure mode: photos from a fortnight abroad are not backed up until you get home - which is precisely the period when phones get lost, stolen and dropped into harbours.
A sensible compromise is Wi-Fi only for video, both for photos. Photos are a few megabytes; video is what destroys a data allowance.
Original quality, or compressed?
Compressed versions are much smaller and perfectly adequate for viewing on a screen.
They are not adequate if you might print, crop heavily, or edit properly later, and they are actively wrong if you shoot RAW - backing up compressed JPEGs of RAW files discards the entire reason for shooting RAW.
Decide by asking what you would want in ten years, not what looks fine today.
Does it include video?
Video is what fills storage. A photo is 3-5 MB; 4K video is 350-400 MB per minute.
Many people want photos backed up automatically and video handled deliberately, and most apps let you separate the two. If yours does not, that is worth knowing before your storage fills.
What happens when you delete on the phone?
This is the setting that surprises people, and the distinction that matters most.
Sync mirrors the phone. Delete a photo there and it disappears from the backup too. That is convenient and it is not protection - an accidental delete-all propagates faithfully.
Backup keeps the stored copy regardless of what happens on the device.
If your goal is protection against loss, you want backup behaviour, or at minimum a recoverable trash with a retention window long enough that you notice the mistake within it. Check that number now rather than on the day you need it.
Is it actually running?
Backup apps stop. An OS update revokes background permissions, a battery optimisation setting suspends the app, a storage limit is quietly reached, or an account gets signed out.
The failure is silent by design - nothing wants to nag you - so the only reliable check is looking at the “last completed” timestamp rather than the “enabled” toggle.
Sizing it honestly
Photo libraries are larger than people expect, and this is exactly where free tiers stop.
| Library | Roughly |
|---|---|
| 1,000 phone photos | 3-5 GB |
| 5,000 photos | 15-25 GB |
| 5 years of casual shooting | 30-60 GB |
| Add regular 4K video | Several hundred GB |
Our free plan is 5 GB of total storage. That is genuinely useful for documents and for sharing work, and it holds roughly 1,200 phone photos - so it will not hold a photo library, and a single long 4K clip can consume most of it.
Backing up years of a camera roll is a paid plan job; plans start at $3.99/month for 100 GB. Our sizing guide covers estimating from your actual library, and what free tiers really give you covers the questions worth asking of any provider.
Backup is not two copies
Uploading photos and then clearing the phone to free space leaves you with exactly one copy again, in a different place. This is the most common way people convince themselves they have a backup when they have a migration.
For anything irreplaceable, keep two copies in different places. Cloud storage plus an occasional export to an external drive is enough, and the export does not need to be frequent - it needs to exist.
The same logic applies to organising what you keep: our guide to what a file audit log should record is about work material, but the underlying point generalises. A protection you have never verified is a belief, not a protection.
What to check right now
Open your backup settings and confirm three things.
That it completed recently - the timestamp, not the toggle. That deleting on the phone does not delete the copy, or that the trash window is long enough to notice. And that the quality setting matches what you would want later, not what was smallest at setup.
Then open a photo from two years ago in the destination. Not the thumbnail - the full image. It takes ten seconds, and it is the only test that actually proves anything.
