One of the areas that is seldom though about is historical data. If something happens how can you roll back that database, get a copy of that old deleted email or a copy of a very important spread sheet from 6 weeks ago or more difficultly 6 months ago.
Some disaster recovery systems are only based on duplicating the data to an off site location, it is normally a regular process of writing over the old just so that the organisation has an up to date copy of the data. Copying data to a USB drive or an external Hard drive is great if all you are interested in is the ability to recover if the building burns down.
This fails when someone has been using the test database to input real data, where the financial information has been compromised and you need to go back and dissect the information from old backups or you have been infected with a virus and do not know when it started. When that happens, that off site DR copy is not going to help.
Not every SME does this but there is a high proportion that do not have a way to look at old information or have the capability to bring it back into the business. Without this capability your business could suffer substantially. A busy office, doing 200 transactions a day, rebuilding the accounting information could take days to resolve, not the type of problem that a business would like to face.
That is when you need a proper back up system, one that takes regular snap shots of your data and keeps that information in a different back up stream.
There are a number of product in the market that does this but all of them have a cost. Just get one that suits your business,