Water is stored in the:
Lithosphere within the rock structure, minerals, in clay and as groundwater (stays here for up to 10,000 years) (this stores doesn't tend to change a great deal)
Hydrosphere in oceans (stays here for 3600 years), seas, rivers (stays here for 2 weeks to 10 years), ponds
Cryosphere in glaciers, ice (stays here for 150,000 years) and snow (this store is the second largest and increases when its colder)
Atmosphere as water storage within clouds but there are microscopic particles (stays here for 10 days) of water everywhere in the atmosphere (this stores doesn't tend to change a great deal)