For most businesses, the only way to backup files on a PC is to purchase the latest and greatest email backup software. But, by far the best option is to use free versions of email backup software. The problem is, when the companies that offer these programs get sold they tend to change the application files. This will make it difficult for your system to find the application on your PC. You will not be able to run the program.
So, if you are getting a free version of the program then this is the best solution. Why? Because of the fact that the company that offers this software is going to have these files in a database on their server. They will be able to update their database with any changes made to the program. So, for example, if the company you are buying the application from gets sold they will have files for the current version of the application. And the new version can be installed onto your computer, or added to the current version if they are not already there.
When you are using a free version of email backup software, you do need to be careful not to let your system to install the new software. If you do this you will be putting your data at risk. When the new version is installed, it will overwrite any data that is already on your computer. The best way to prevent this is to just let the application install and let the existing files are the backup.