# Data Cache Disk Streaming

Data Cache Disk Streaming provides a fast way to save large amounts of unfiltered data in a binary format (.vsb) message buffer file. This feature can be accessed using the Vehicle Spy [Setup](/vspy-3-documentation/vehicle-spy-main-menus/main-menu-setup.md) main menu or the dropdown button next to the **Data Directory** button as shown in **Figure 1**.

![Figure 1: The dropdown button next to Data Directory can be clicked to see Data Cache selections.](/files/FOrsi2s6uGM3qi6WzGZY)

To enable or disable Data Cache Disk Streaming, use the **setup dialog** checkbox or the **Data Cache On** dropdown list selection while Vehicle Spy is offline.Once enabled, all network traffic will be streamed to disk anytime Vehicle Spy is running.Data is saved in a binary format (.vsb) file in the Vehicle Spy 3\DataCache directory with a specific date and timestamp.A new data cache file is created each time Vehicle Spy transitions from offline to online while Data Cache Disk Streaming is enabled.\
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If more advanced buffer capture features are needed then [Capture type function blocks](/vspy-3-documentation/vehicle-spy-main-menus/main-menu-scripting-and-automation/function-blocks/function-blocks-types/capture-type-function-block.md) can be used instead.


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