Backup data frorm Sharp Wizard OZ-730

Hi,
I have been using the Sharp Wizard OZ-730 for 5 years. I have a lot of data in it, but the pixels are gradually disappear. I don't have time to learn a new PDA. So my question is:
Is there any way to convert the backup data on the PC from the OZ-730 to a spreadsheet or any readable format so I can at least be able to read them if the OZ-730 becomes unreadable?
Or is there any way to import the backup data from the OZ-730 to another PDA?

Thank you very much in advance for any help.