1 when you keep or put something in a special place while it is not being used :
the storage of radioactive material
the storage of radioactive material storage space/capacity (=space etc for keeping things in)
They moved to a house with lots of storage space.
They moved to a house with lots of storage space.2 when you pay to keep furniture or other goods in a special place until you need to use them
storage costs
storage costs3TD the way that information is kept on a computer :
data storage
data storage