Juniper Allegro CE Owner's Manual page 167

Some applications automatically bring up the My Documents folder
when you save a file as shown in the example below. My Documents is
stored in RAM, not on the internal non-volatile storage.
To save files to the internal non-volatile storage, switch the drive to
the C_Drive before you save the file:
For more information about data storage options, refer to Chapter 3,
Memory Configuration and Data Storage Options.
Windows CE Page 4-107