How often it changes, your ability to reconstruct data in case of a casualty, the cost of backups vs. rebuilding the data and the overall importance of the data.
At least once a week,but once a day isn't excessive.
In case the data is lost and therefore cannot be recovered unless there is a back up
how often should work be backed up how often should work be backed up
data files
data files
Banking Institutions back-up their data 'live'. Every time the computer carries out a transaction - it performs an incremental back-up. This means that - it only backs-up accounts that have had new transactions applied to them.
You should back up data before installing new software on the off chance that the software deletes a bunch of stuff, infects your computer with a virus, etc. Basically, you do it so that if you loose anything, you can get it back.
If you use iTunes then your Ipod should have backed up all your applications onto your account. Therefore when you are next on your iTunes add your back up data to your ipod.
All back up methods are a great idea for saving data. You should always create a data back up. So having 2 data disc is always a great idea and peace of mind that your pictures will always be around.
Unfortunately, there is no way to back up your data.
When you are trying to create a backup system you should consider the following:What needs to be backed upHow often it needs to be backed upHow much space is necessary to back it upWhere the backup should be storedHow the backed up data should be encrypted and lastly;Who should have access to the backup.