Family Secrets

You will enter the apartment of Granny.
Granny recently died. She showed some strange behaviour the last few days before she died. Suddenly she started to hide and lock everything.
After she died, we discovered she had an appointment at the notary to adapt her will. After a while we discovered someone from the family wants to steal her heritage. Unfortunately, she couldn't take care to secure her heritage before she died. Can you solve this mystery within 60 minutes?