“You can never have too much of a good thing”. The same goes for backups. Data is critical for the operation and success of your business. We recommend having multiple backup processes to different devices so if disaster strikes, you can recover.
The external storage device we recommended in our email is a great way to add an additional copy of server data, but is large enough you can include workstation data as well. It also has great features such as remote access, so it can be stored offsite, but your data is still available through a secure connection to authorized users.