The Learning from Backup via Network

When try to prepare backup job, have to concern

What data is needed
Which one is wanted to backup

When to backup
Hourly? Weekly? Working Hours? Non-Working Hours?

The schedule should not be influencing the normal processing

Balance the cost of backup and the losing of data. Still have to backup daily, although the data is not changed daily?

Why - For What?
Restore? Go Back?

Think about if it is really needed

How To
Directly? Network? Tapes? USB Drives? Hard Disk?

If the size of data is too large, should be directly. If not, can be via network

Choose which method? Full? Incremental? Differential?

Also concern - Overwrite? Append?