Move everything to a new phone in one sitting

The most expensive mistake in phone ownership takes about four seconds. Someone taps factory reset on a device they have already handed over mentally, and several years of photographs stop existing.

It happens because the new phone looks finished. Photos are there, apps are installed, everything appears to have come across. So the old one gets wiped for trade-in, and the gaps turn up weeks later when somebody goes looking for a specific picture.

The fix is an order of operations rather than any particular tool. This guide covers how to move files from phone to cloud before you start, what to verify on the new device, the things cloud storage does not cover, and why the reset is always the last step rather than the second to last.

Everything else on this page is detail. This is the part that determines whether anything gets lost.

Once a factory reset completes, the data is gone. Not hidden, not recoverable by a shop, not sitting in a folder somewhere. The device is returned to the state it left the factory in, and no service can undo it.

So the old phone stays intact and untouched until the new one is fully set up and verified. Not until it looks set up. Until you have actually opened files on it and confirmed they are there.

There is rarely any reason to rush. A trade-in window is usually a fortnight, not an afternoon, and keeping a wiped-but-unsent phone in a drawer for a week costs nothing.

Do this on the old device while it is still working normally. It is the part people skip because the new phone is sitting there in its box.

• Run a final backup and wait for it to report complete, not in progress or waiting for Wi-Fi.
• Check the folder selection covers messaging media, screenshots and downloads, not just the camera folder.
• Open two or three recent files from your account in a browser on a computer, which proves they are genuinely stored rather than queued.
• Note what is not in cloud storage, covered in the next section, because those need separate handling.

That third step is the one that matters. A status label saying complete is a claim by the app. Watching a photo load in a browser on a different machine is evidence. On a day when you are about to erase the original, evidence is worth the extra minute.

If the backup has not run in a while, this is the moment to let it finish properly. Plug the phone in, put it on Wi-Fi, and leave it alone until it is done, even if that means the new phone waits until tomorrow.

The setup guide covers getting a backup running properly if the old phone never had one.

This is the gap that catches people. Files are handled. Several other things are not, and they need their own plan.

Cloud storage holds your photos, videos and documents. It does not hold:

• Contacts. Usually tied to your Google or Apple account rather than your file storage.
• Messages. SMS and app conversations each have their own transfer or backup mechanism.
• App data and logins. Game progress, two-factor authenticator codes, app-specific settings.
• Call history and voicemail. Frequently not transferred at all.
• Wallet and payment cards. Normally re-added by hand on the new device.

Two-factor authenticator apps deserve particular attention, because they are the one item that can lock you out of everything else. Many do not transfer automatically, and wiping a phone with an authenticator on it can mean losing access to accounts that now require a code you cannot generate. Move it deliberately, using whatever export or transfer feature it offers, before the old phone is wiped.

With the old phone backed up and verified, the new one is mostly signing in and waiting.

• Sign into your cloud storage account with the same credentials, not a new account created during setup.
• Let your library load. Files download as you open them rather than all at once, so this is quick.
• Turn automatic backup on for the new device, and grant full photo access rather than limited.
• Check the folder selection again, since a fresh install defaults back to the camera folder only.
• Handle the non-file items from your list: contacts, messages, authenticator, wallet.

The first point is where a surprising number of problems start. Setup flows often present a sign-up screen rather than a sign-in one, and it is easy to create a second empty account without noticing. If your new phone shows no files, check the email address before assuming anything went wrong.

The permission step matters as much on a new phone as it did on the old one. A fresh install asks again, and choosing limited access produces a backup that reports success while covering almost nothing.

Platform specifics are covered in the Android guide and the iPhone guide, including the battery and background settings that quietly pause uploads.

Moving between platforms is where manufacturer device backups stop helping. An Android backup expects to restore onto Android, and an iPhone backup onto an iPhone.

Files kept in a cross platform account sidestep that entirely, because they are in an account rather than a device backup. Sign in on the new phone, whatever it runs, and the library is there.

What still needs work when changing platforms:

• Messages need a dedicated transfer tool, and results vary.
• Paid apps do not carry across stores, so anything purchased is bought again.
• Watches and accessories may not be compatible with the new platform.
• Subscriptions billed through the old store need cancelling and re-subscribing.

None of those are file problems, which is the point. Once your photos and documents are in an account that both platforms can reach, the remaining work is administrative rather than risky. The cross platform guide covers running one account across devices in more detail.

This is the checkpoint between a successful switch and a slow-motion loss. Spend ten minutes here.

On the new phone, with the old one still intact, confirm:

• Your oldest photos are there, not just recent ones. Scroll right back to the start of your library.
• Photos people sent you are there, which means checking messaging media specifically.
• Screenshots and downloads are there, since those live in separate folders.
• Contacts came across, including ones you rarely use.
• Messages transferred, if you needed them.
• Your authenticator works, by actually signing into something with it.
• Banking and wallet apps work, since these often require re-verification.

Checking the oldest material rather than the newest is deliberate. Recent files are the most likely to have transferred and the least likely to reveal a gap. Problems live at the far end of the library, in the years nobody scrolls back to.

Use the new phone as your only phone for a few days before wiping the old one. Real use surfaces things a checklist will not, usually in the form of an app asking for something you did not know was only on the old device.

Only once the new phone has been in real use and everything checks out.

• Sign out of your accounts first, particularly the Google or Apple account, since activation locks can otherwise leave the device unusable for the next owner.
• Remove the SIM and any memory card. A card is not erased by a factory reset and will go with the phone if you leave it in.
• Run the factory reset from settings rather than deleting things manually.
• Check it boots to the welcome screen, which confirms the reset completed.

The memory card is the one people forget. It is physically separate from the phone's storage, a reset does not touch it, and it frequently holds photos and documents. Take it out even if you think it is empty.

Signing out first also matters more than it sounds. A phone still tied to an account can be locked to it, which turns a trade-in into a support call.

The questions that come up most often about moving to a new phone.

• Run a final backup on the old phone and wait for complete
• Confirm folder selection covers messaging media, screenshots and downloads
• Open several files from your account in a browser to verify
• List what is not a file: contacts, messages, authenticator, wallet
• Sign into the same account on the new phone, not a new one
• Turn on backup and grant full photo access on the new device
• Check your oldest photos, not just recent ones
• Use the new phone as your only phone for a few days
• Sign out of accounts, remove SIM and memory card
• Only then factory reset the old phone

Nine of those ten steps are reversible. The tenth is not, which is the entire reason for the order.