A range of storage boxes are available for prepared samples on TEM grids that have to be stored either at room temperature (RT) or at cryo temperatures (CT). These can hold up to 100 samples (RT) or 4 samples (CT) per grid box. Long-term storage allows safe preservation for months to years. Unintentional shifting and shaking is prevented by mechanical fixation. The numbering of the grid slots enables individual archiving.