Can network monitoring detect data copied to a USB stick?
No. Copying files to a USB stick, an external disk or a phone connected by cable happens inside the computer and never crosses the network, so no network sensor, NetSenX included, can see it. That gap is covered on the endpoint: device-control settings in your endpoint protection or operating system can block or log removable storage, data-loss-prevention (DLP) tools can watch which files are copied, and disk encryption protects company laptops if they are lost. Network monitoring helps only at a later step: if the copied data is later uploaded from a company device on a monitored network, an unusual outbound volume from that device can raise an alert. Decide which control fits, explain it to employees, and check national rules on monitoring at work before you switch on file-level logging.
General information, not legal advice. National laws can add to the EU texts quoted here, for example deadlines, forms or reporting channels: check your own country's rules.
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