a question about qbits

Hi. I am trying to understand qbits. I have general knowledge of quantum theory. In a ordinary silicon chip a transistor can be set to either 0 or 1 and therefore can store one bit of information that can be read. I understand that a quibit can be in three states. If it is not being read it is in a state which can either be a 0 or a 1. If it is not being read, it  in a state which is described as both a 0and a 1 at the same time, a quantum state.  Let’s say one wants to store a bit of information in it, example a1. How does one do this? If later we need to retrieve this information, when we retrieve this information, then we must read the information from the qbit, how does one guarantee that the qbit spits out the correct response from its superpositionsl state?