How to know when a pen drive is used on office PCs

Why pen drives matter

Most data theft in small offices isn’t hacking. It’s an employee exporting a spreadsheet and copying it to a USB stick, often in their last weeks before leaving. It’s fast, leaves no trace in email, and the drive fits in a pocket. Knowing when a drive is plugged in, and on which PC, is one of the simplest ways to protect your leads and customer data.

Option 1: Check Windows logs (free, after the fact)

Windows keeps a record of USB storage devices that have been connected. An IT person can look through Event Viewer, or the list of USB devices Windows has seen, to find out which drives were connected to a PC and roughly when.

• Good: free, and already on every Windows PC.
• Limits: it needs technical knowledge, you only find out after you think to look, it’s checked one PC at a time, and it doesn’t show what was on screen when the drive was used.

Option 2: Block USB storage completely

On Windows Pro PCs, an admin can use Group Policy, under Removable Storage Access, to deny access to removable drives. Mice, keyboards and headsets keep working.

• Good: pen drives simply stop working, so the risk is gone.
• Limits: it needs admin setup on every PC, Windows Home doesn’t include the Group Policy editor, and it breaks legitimate uses, such as an accountant bringing files or staff printing from a USB stick. Many small offices end up turning it off again.

Option 3: USB port monitoring software with real-time alerts

Employee monitoring software with USB device monitoring can alert you the moment a USB drive is connected, on any PC, wherever you are.

• Good: you find out immediately, you get proof, it works on office and home PCs, and legitimate use can continue.
• Limits: it costs money, and you should tell staff in writing that work PCs are monitored.

With TraqDesk pen-drive alerts, every USB storage plug-in creates an alert that shows the drive name, the PC and the time, and takes an automatic screenshot of the screen. Alerts can go to the TraqDesk console, email, Slack or Microsoft Teams, so you see them on your phone. From the console you can watch that screen live or lock the PC in one click.

Which should you choose?

• Nobody ever needs a pen drive at work: block USB storage with Group Policy, and use alerts as a back-up in case the block is removed.
• Some people need USB drives: allow them, but get an alert every time one is used.
• You have remote staff: use alerts. Office-only controls won’t reach home PCs.
• You suspect someone right now: turn on alerts and live screen viewing for that PC, and record the screen as video if needed.

Don’t forget the other routes

Pen drives are only one way data leaves. Personal email, Google Drive and WhatsApp Web are just as common. Read our full guide on how to stop employees stealing leads and data, and our call centre monitoring page if you run a telecalling team.