Hi greenlees,
I don't mean to sound like I'm fobbing you off, but probably the best thing to do is check the manual that came on pdf with the unit. (If you haven't got a copy of the manual, you can get it at
http://www.iriver.com/support/download_list.asp) In the case of the iRiver Story, how to reset the device is on page 14. It has diagrams, so that's probably more reliable than my trying to explain it here in words.
But the manual says you should only reset the device if it's stopped functioning. If it's working OK, then doing a reset won't improve anything and can actually damage the operating files.
If you meant to ask about doing a re-install, then that's pretty straightforward. What I did was:
a) connected the device to my PC, and used Windows Explorer to copy all my book files onto my PC for safekeeping.
b) deleted all files and folders on the Story
c) copied the ebook.hex file (the firmware) onto the Story
d) then "stopped" the USB connection, disconnected the device from the PC, let it reboot, and let the firmware installation run to its completion
e) pressed the Menu button, went into Settings, and chose Initialise, to set everything back to factory defaults
f) rebooted the Story, then went back into Settings to update the time, date, owner etc
g) connected to my PC again and copied all my files back on
Seemed to work for me. (If anyone can see a problem with what I did, I'd be grateful if you'd let me know.)
Anyway, I hope that helps.