1. Step In general, when lightning strikes hit your house and go into the main line you’re done and you will have a hard time to recover data, that why it’s a good idea to create a backup on DVD’s or Blu-Ray discs of your most important data
2. Step However, you can protect yourself from excess voltage when your equipment get a sudden surge due to a lightning strike hitting something close with a UPC (Uninterrupted Power Supplies)
UPC’s are getting cheaper and if you own some equipment that you want to protect from lightning, you should definitely consider getting one.
For a home office this is definitely recommended.