Before You Donate, Sell or Recycle a Computer
Every year we hear from someone who bought a used computer and found the previous owner's tax returns on it. Delete doesn't delete. A drive that no longer boots holds everything it ever held. Here's how to make the data actually gone.
Deleting a file tells the file system the space is free. It doesn't touch the data, and a free recovery tool brings it back in minutes. A quick format does the same thing at a larger scale. What makes data gone is overwriting it, or destroying the encryption key that scrambled it, or destroying the drive. Which of those applies depends on what kind of machine you have, and the order you do things in decides whether the next owner gets a working computer or a locked brick.
The Short Version
Back up. Sign out of the accounts that lock the machine to you. Then wipe with the method that matches the drive: a full reset with Clean data on a Windows PC, Erase All Content and Settings on a Mac, a factory reset on a phone that's already encrypted, and a manufacturer's secure-erase tool or physical destruction for a bare drive. If the machine won't turn on, pull the drive.
Before You Wipe
Back up what you're keeping
Files, photos, browser bookmarks, the password manager export. Check the Downloads folder and the desktop; that's where the things people forget live. See home backup strategy.
Sign out of the accounts that lock the machine
iCloud and Find My on a Mac or iPhone, or Activation Lock bricks it for the next owner. The Microsoft account on a Windows PC. The Google account on an Android phone or Chromebook, or Factory Reset Protection does the same.
Deauthorize the software
Adobe, Microsoft 365, Apple Music and iTunes computer authorizations, Steam, and any licensed program with a seat count. Write down license keys you'll reinstall elsewhere.
Remove it from your accounts and from work management
Remove the machine from your Apple, Google or Microsoft device list afterward. If it was ever enrolled in a company's device management, IT has to release it first.
Check the slots
SD cards, a USB stick in the back, a disc in the drive.
Wiping It
| Machine | Method | Notes |
|---|---|---|
| Windows 10 or 11 PC | Settings, then Recovery, then Reset this PC, then Remove everything. On the next screen choose Change settings and turn on Clean data. | Clean data is the option that matters; without it the reset is a delete, not a wipe. It takes hours. Leave it plugged in. |
| Mac from 2018 or newer | System Settings, General, Transfer or Reset, Erase All Content and Settings | An instant crypto-erase: the encryption key is destroyed and the data is unreadable. Sign out of iCloud first. |
| Older Mac | Recovery mode, Disk Utility, erase the drive, reinstall macOS | On a spinning drive, choose the secure-erase option if it's offered. |
| Chromebook | Powerwash | Remove it from your Google account afterward. |
| iPhone or iPad | Settings, General, Transfer or Reset, Erase All Content and Settings | Encrypted by default. Sign out of iCloud first or Activation Lock stays on. |
| Android | Sign out of the Google account, then Settings, System, Reset, Erase all data | Encrypted by default on anything recent. |
| A bare spinning hard drive | Any full overwrite; one pass is enough on a modern drive | A bootable wipe tool, or connect it to another machine and use a wipe utility. |
| A bare SSD | The manufacturer's tool (Samsung Magician, Crucial Storage Executive and the like) with Secure Erase | Don't run multi-pass overwrites on an SSD; they wear it out and miss the reserved cells. If BitLocker or FileVault was on, deleting the key is the erase. |
| A drive that doesn't work | Physical destruction | Drill through the platters, or bring it to us for certified destruction. |
The Drive That Won't Boot
A dead computer is not a dead drive. If the machine won't power on, take the drive out before it goes anywhere (a few screws on a desktop, a bit more on a laptop) and either wipe it in another machine, keep it, or have it destroyed. A drive you can't wipe is a drive you can't hand over. Our data recovery page covers secure destruction; it's the same skill in reverse.
For a Business
HIPAA, the FTC Safeguards Rule and most cyber insurance policies want disposal documented: what was wiped or destroyed, when, how, and by whom. Keep an asset list, wipe with a method that produces a log or get a certificate of destruction, and don't donate business machines that held client data unless both exist. Our compliance guide covers where that record lives.
Where It Goes
Pinellas and Hillsborough both accept electronics at their household hazardous waste sites, most electronics retailers take old computers for recycling, and charities take working machines. A wiped machine is a fine donation. A machine handed over “with everything still on it so they can use it” is an identity theft kit.
Quick Self-Check
| Question | If “no” or “not sure”... |
|---|---|
| Did you sign out of iCloud, Microsoft or Google before the reset? | Do it first, or the next owner gets a brick |
| Did the Windows reset have Clean data turned on? | Otherwise it was a delete, not a wipe |
| Do you know whether the drive is an SSD or a spinning disk? | It changes the method |
| Business: is there a record of what was wiped? | Worth a call |
Not Sure It's Really Gone?
We wipe drives with a method that matches the hardware and produces a record, destroy the ones that can't be wiped, and recover data from the ones you wish you'd backed up first.
Frequently Asked Questions
Is a factory reset enough on a phone?
Yes, on any recent iPhone or Android, because the storage is encrypted and the reset destroys the key. Sign out of iCloud or your Google account first so the activation lock doesn't stay on for the next owner.
Can a recycler recover my data?
From a properly wiped drive, no. From a deleted or quick-formatted one, easily. From a dead drive, yes, with the same tools we use for recovery.
Should I just remove the drive before donating?
That's a perfectly good option. The charity can add an inexpensive drive, and you keep or destroy the original.
Is a magnet enough?
No. A professional degausser destroys a spinning drive; a refrigerator magnet doesn't. And nothing magnetic touches an SSD at all.
How do I wipe a drive I'm keeping to reuse?
Same tools. A full reset with Clean data, or the manufacturer's secure erase, and then reinstall. It's also the cleanest fix for a machine that's been misbehaving for years.
More Guides
Recovery for hard drives, SSDs and servers, plus secure destruction.
The October 2026 deadline, who can still get updates, and the upgrade-or-replace math.
The rule of thumb we actually use, and the hidden costs of just buying new.
What to do (and what to stop doing) when a drive starts clicking.
The FTC Safeguards Rule, the nine elements, and the disposal rule it requires.
The 3-2-1 rule, what ransomware changes about it, and the set-and-forget version.
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