A thinner composition includes propylene glycol ether acetate, methyl 2-hydroxy-2-methyl propionate, and an ester compound such as ethyl lactate, ethyl 3-ethoxy propionate or a mixture thereof. A database of complete search queries is searched to identify a first set of matching complete search queries. The trilayer stack has two free layers separated by a nonmagnetic layer and a biasing magnet positioned at the rear of the stack and separated from the air bearing surface. Since the storage device having an identifier which differs from the identifier recorded on the memory medium inhibits access to the memory medium for the reading and writing of data, the secrecy of data recorded on the memory medium is ensured.