How to Securely Wipe a Device Before Recycling
Selling, donating or recycling an old phone or computer? Before it leaves your hands, it needs wiping properly — and "properly" matters, because a quick delete or even a casual reset can leave personal data behind that the next owner could recover. Old devices hold a startling amount about us: photos, emails, saved passwords, banking apps. This guide shows you how to remove all of it for good, then pass the device on responsibly.
Why a simple delete isn't enough
When you delete files, the device usually just marks that space as free to reuse — the data often lingers until something writes over it, which is exactly how data recovery works. That's brilliant when you need a lost file back, and a serious problem when a stranger has your old laptop. The good news is that a proper factory reset on modern devices, combined with the steps below, genuinely removes your data rather than just hiding it.
1. Back up anything you want to keep
First, rescue what matters. Save your photos, files and anything you'll need to the cloud or another device — once the wipe is done, it's gone for good. It's painfully common to wipe an old phone only to realise a handful of irreplaceable photos lived nowhere else. See our guides to backing up an iPhone, an Android phone, or moving files to a new computer.
2. Sign out and remove activation locks
This step is as important as the wipe itself. Sign out of your accounts and turn off the anti-theft locks: Find My on Apple devices, and the Google account lock on Android. Skip it and the device stays tied to you — the next owner can't activate it, and you may keep getting prompts about it. On a computer, sign out of your Microsoft or Apple account and de-authorise any apps tied to the machine.
3. Factory reset phones and tablets
Use the device's built-in factory reset (Settings → General → Transfer or Reset on iPhone/iPad; Settings → System → Reset on Android). Because modern phones and tablets encrypt their storage by default, a proper factory reset is genuinely secure — it throws away the encryption key, leaving the data unreadable. For computers, see resetting a Windows PC or a Mac, choosing the "remove everything / erase" option.
4. Securely wipe a computer drive
Computers need a little more care than phones. On a PC or Mac, use the reset's secure erase option. For any machine that held financial or business data — or where you simply want certainty — the safest approach is to remove the drive and physically destroy it. An old mechanical hard drive in particular can give up data even after a basic format, so for sensitive information, destruction beats trust.
5. Recycle or pass it on responsibly
With the device wiped and unlocked, give it a good onward life. Working devices can be sold, traded in, or donated to family, schools or charities. Anything beyond use should go to a council recycling point or a retailer take-back scheme — electronics contain valuable recoverable materials and some that shouldn't go to landfill, so they're never bin material. Our guide to what to do with old tech has more.
Don't forget the small stuff
- Remove SIM and memory cards. They hold data and aren't wiped by a factory reset — take them out.
- Cancel or move subscriptions and eSIMs. Transfer your number and any eSIM before wiping.
- Check linked devices. Remove the old device from your account's list of trusted devices.
Why this matters more than people think
It's easy to be casual about an old phone in a drawer, but discarded devices are a genuine source of identity theft and fraud. A handset that still has your email signed in, or a laptop with saved banking logins and browser passwords, is a gift to anyone who comes across it — and charity shops and recyclers regularly report receiving devices still full of personal data. Spending ten minutes to wipe a device properly protects your accounts, your identity, and — if it ever held anyone else's information — other people's privacy too. It's a small effort for real, lasting peace of mind.
Doing this for a business?
For businesses, secure data destruction isn't just good practice — under data-protection law it's a responsibility, and a leaked old drive can mean a reportable breach. We handle secure wiping, drive destruction and documented decommissioning as part of our hardware support, so retired kit leaves your premises clean, recorded and recycled properly. Just get in touch.