How to dispose of old computers securely

Why simply deleting files isn't enough

Deleting files or reformatting a drive usually only removes the pointers to the data, not the data itself. Free recovery software can often bring it back. Old computers, laptops and mobile phones can hold client files, personal data, saved passwords, email and confidential information. For a business, a device that leaves your control with data on it is a potential data breach.

Step by step: how to safely dispose of an old computer

1. List the devices. Record make, model and serial number for each old laptop, desktop, server, phone, tablet, printer and external drive.
2. Back up important files and confirm the backup works.
3. Remove the device from your systems. Remove it from device management, sign out of Microsoft 365 and other accounts, and remove it from any MFA registrations.
4. Securely erase or destroy the storage.
   • Hard drives (HDD): a certified overwrite, or physical destruction.
   • Solid-state drives (SSD): use the manufacturer's secure-erase or a cryptographic erase; standard overwriting isn't reliable on SSDs. For sensitive data, physical destruction.
   • Phones and tablets: if encrypted (modern iPhone and Android devices are by default), a factory reset destroys the encryption key. Remove SIM and memory cards first.
   • Printers and copiers: many store scanned documents on internal drives. Include them.
5. Get a certificate of data destruction listing each device by serial number, the method used and the date. Keep it with your records.
6. Recycle through a certified e-waste recycler or designated collection point. Take batteries out where possible and recycle them separately.

Why e-waste recycling matters

Electronic waste is one of the fastest-growing waste streams. Computers and other electronic equipment contain hazardous materials, such as lead, mercury and flame retardants in plastics, which can harm the environment and human health in landfill. They also contain valuable materials, including gold, copper and aluminium, that responsible recycling recovers as raw materials for new electronic products. That's the idea behind the circular economy: keeping materials in use instead of sending them to landfill.

Lithium batteries in laptops and phones are a fire risk in household and council bins, so never put them in a general waste or recycling bin. Use a battery drop-off point instead.

Where to recycle e-waste in Australia

• National Television and Computer Recycling Scheme: complimentary drop-off for computers, computer accessories (such as keyboards and computer mice), printers and TVs at participating collection points.
• Council e-waste days and drop-off centres. Many councils run complimentary collection for households; businesses should check eligibility.
• Business e-waste recycling services that collect from your office, securely erase or destroy drives and provide certificates.

Rules vary by state. Victoria, for example, has banned e-waste from landfill since 2019, and the Victorian Government funds e-waste collection sites. Other states have their own programs, so check your local council.

Recycle, reuse or donate?

• Recycle if the old computer is broken, near the end of its useful life, or held sensitive data you can't verify was erased.
• Reuse or donate only after a verified data erasure and certificate. Many charities and community organisations give professionally wiped laptops a second life.

When to call a professional

If your old devices held health, financial or client data, use a provider that securely erases or destroys drives to a recognised standard and gives you per-device certificates. Static Computers' e-waste recycling service handles this for Sydney businesses.