I need to write an article and I have to use this word in the context. I cannot replace the word with a different word (warehouse, repository, etc.). I checked this word via http://dictionary.cambridge.org/dictionary/english/storage and Cambridge dictionaries online said 'storage' is uncountable and http://www.oxfordlearnersdictionaries.com/definition/english/storage?q=storage Oxford learner sdictionarie said 'storage' is uncountable too.
But I am not sure that cannot be countable in this example:
The storage can be divided into some small storages
Thank you for your time.