Modular Storage Device and Filament Outlet

A modular storage device, comprising:

• a drying unit, including:
• a second air outlet port, configured to be coupled with a first air inlet of a housing of an independent housing,
• a second air inlet port, configured to be coupled with a first air outlet of the housing, and
• an air-blowing module, configured to draw internal air from the housing through the second air inlet port, and inject external air into the housing through the second air outlet port, wherein
• a second relative humidity of the external air is lower than a first relative humidity of the internal air.

The modular storage device according to claim 18, wherein the drying module further includes:

• an air channel, wherein
• the air channel meets as least one of the following conditions:
• the air channel is at least partially connected to the second air outlet and the second air inlet port, such that at least part of the internal air flows through the drying module to form at least a part of the external air, or
• the air channel is at least partially connected to the second air outlet and an external environment of the drying unit, such that air from the external environment flows through the drying module to form at least a part of the external air.