An optical data storage system writes or reads information with respect to an optical storage medium using an optical pickup including a solid immersion optical system or a solid immersion lens for generating a near-field and emitting a light beam. The method uses a head system having multiple successive sets of dispensers. The adjustability of the valve is assured in particular by an adjusting ring. The handle and the dental floss holder cooperate to prevent transverse movement of the dental floss holder. The system stores, in a storage device, the recorded conference calls as one or more files. However, the total optical path can be shortened and the reliability of steerable mirrors can be maintained or increased if at least some of the micro-mirrors in an array are offset angled.