How to Check a USB Drive Safely Before Opening Its Files
Unknown USB drives can contain malicious files or exploit outdated devices; treat unexpected drives with caution.
The aim is to help you complete one clear task, recognize what needs verification, and avoid the most common mistakes. Work through the checks in order, then use the real-world example to apply them to your situation.
This guide is designed as a practical decision checklist. Use the relevant official guidance alongside the steps, especially when rules depend on your country, device or individual circumstances.
1. Do not plug in a found drive
A USB stick left in a public place may be deliberately planted. Do not connect it to your personal computer; give it to lost-property or IT staff.
2. Use media from known sources
Label your drives and track who has used them. Confirm why files are being shared and be wary of unexpected executables, scripts and shortcuts.
3. Scan and inspect carefully
Keep security software updated and scan media with the tool already installed. Do not bypass warnings; ask IT staff to inspect unfamiliar work media.
4. Eject and back up
Use the operating system's safe-eject option. Keep a separate backup of important files and avoid relying on one USB stick.
Verify the source before acting
For the definitions, current capabilities or rules behind this topic, use the original source below. Features, eligibility, safety requirements and local laws can change. A guide cannot replace a provider's official instructions or qualified advice for a consequential decision.