My O 300, whisch is all flash, has an option on the desktop software transfere application to format internal memory...
take battery out hold a finger on both baterry post and hold power button in/on 5-10 seconds.
look for a reset button
check mak sure your 'lock keys' slider/button isn't activated.
I'm not familiar with the O1K/Gatway one, but good luck -
call RP - LOL
e