Documents on paper can be quickly copied using all-in-one devices. USB or SD ports also make it possible to digitise even large quantities of paper documents directly and store them on USB pen drives or SD cards without any controls. These interfaces also make it possible to print documents stored on such media.

If printers, copiers, or all-in-one devices are connected to a data network or directly to clients, IT systems can often also directly access the storage media connected to these devices. Even if the integration of storage media is technically prevented on IT systems themselves, this work-around via storage interfaces makes it possible to copy information in an uncontrolled manner.

In this way, (malicious) software can spread to the clients connected to all-in-one devices or into an organisation's data network via the devices' storage interfaces. Meanwhile, confidential (paper) documents can also be digitised unnoticed and stolen in an untraceable manner.