USB memory devices and other memory media can be easy and convenient, but they can also lead to information leakage. You can prohibit the use of memory media for specific functions or all functions.
Even if you use this setting to restrict the use of memory media, a computer can still be connected to the USB port on the back of the machine. To also restrict computer connections, see the following. Preventing Connection to Computer via USB Port
Preventing Use of Memory Media When Scanning and Printing
This section describes how to configure the settings using Remote UI from a computer. On the control panel, press [Menu] in the [Home] screen, and then press [Function Settings] to configure the settings. [Memory Media Settings] Administrator privileges are required. The machine must be restarted to apply the settings.
This section describes how to configure the settings using Remote UI from a computer. On the control panel, press [Menu] in the [Home] screen, and then press [Preferences] to configure the settings. [USB Settings] Administrator privileges are required. The machine must be restarted to apply the settings.
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[Memory Media Settings] 
To prevent saving scanned data to memory media