7Formats and Data Flow
202 Keysight 53210A User’s Guide
Counter File System
Measurements in volatile reading memory and counter configuration states can 
be stored in files within the counter’s internal (non-volatile) flash memory, or on a 
external USB memory device connected to the ‘host’ port on the front panel 
(Figure 7-1). 
Files are created within folders on the root directory, or within sub-folders relative 
to the root directory. The relationship of folders and files in internal flash memory 
and on the USB drive is shown in Figure 7-2.
Figure 7-2 Folders and Files within Internal Memory and USB Storage.