This page answers the following frequently asked questions:
Why does the installer display a warning about incompatible third-party software?
How do I install my license key?
What is the recommended configuration of Firestreamer?
It is entirely up to you. The best practice is to begin using Firestreamer in the default configuration (one tape library, five tape drives, 200 storage slots). If after some time you feel that it needs to be changed, you would then know what works for you best.