Calendarscope lets you back up your data and you can use it if your regular file becomes lost or damaged.

You can help protect your Calendarscope data by developing good backup habits:

• Regularly back up your file and save it onto a separate floppy or hard disk so that if your computer stops working and you lose data, you'll have a recent backup copy.
• Date your backups so you don't overwrite the previous one. To save hard disk space, delete outdated backups.