A drying storage according to the present invention can be carried or moved by a user or installed as a built-in in the user's residence, and can maintain an object in a dried state after drying the object to be dried, so that the convenience of use can be improved, wherein a desiccant material with an equilibrium moisture content suitable for the temperature and humidity conditions in which the drying storage is used, is applied so that the inside air of the drying storage is inhaled during a dehumidification operation to allow sufficient dehumidification and the outside air of the drying storage is inhaled during a regeneration operation to enable sufficient regeneration of the desiccant material.

A system (27) arranged to dry a filament (5) used in additive manufacture, the system (27) comprising: a first heater (55) arranged to heat air; a tubing section (29) having a wall (31) defining an enclosed passage (33), the passage (33) arranged to convey a filament (5), the tubing section (29) having an air inlet (51) for providing heated air from the first heater (55) into the passage (33); and a second heater (59) arranged around along at least part of the tubing section (29), in order to further heat filament (5) within the passage (33).