For normal day to day operations you should
backup any files that were
changed for that business day.
You should backup all your data either on a daily, weekly, or monthly basis,
depending on how much data you generate or how much you change your data.
A person or business that only changes a word doc or spread sheet once a week
wouldn't back it up daily.
A person or business that has constantly changing
documents should backup daily. A backup is only as good as the last time it was
accomplished, in other words if you don't backup on a regular or scheduled basis
then any data you generated between the backup and the recovery will be lost.
Backup regularly on a schedule!!
Where to backup your data to? Well this depends on how much data you have. Say
you have a small business. Your business uses email and spread sheets and
occasionally a word document. Your total daily generated data may be ten meg of
data. This of course is to large for a floppy.