Once you retrieve the .vbo data files as logged by the VBOX, you can use VBOX File Processor to process the files to make them more manageable before analysis in VBOX Test Suite.
Firstly, use the Downsample plugin to change the sample rate of the files. For example, users often downsample from 10 Hz to 1 Hz for large datasets.
After downsampling, you can join all of the processed files together using VBO Append. This will create one file, which you can analyse with VBOX Test Suite.