Breakdown of jungyohan munseoneun poldeoreul ttaro mandeureoseo jeojanghae dwo.
Questions & Answers about jungyohan munseoneun poldeoreul ttaro mandeureoseo jeojanghae dwo.
문서는 uses the topic marker 는, not the object marker 를.
Here, 중요한 문서는 means something like:
- as for important documents
- when it comes to important documents
So the sentence sets important documents as the topic, and then gives advice about what to do with them.
A very literal breakdown is:
- 중요한 문서는 = as for important documents
- 폴더를 따로 만들어서 저장해 둬 = make a separate folder and save them there / keep them saved
If you used 문서를, the sentence would feel more like it was focusing directly on important documents as the object of the action, rather than introducing them as the topic.
In Korean, nouns often do not need a plural marker even when they refer to multiple things.
So 중요한 문서 can mean:
- an important document
- important documents
The context tells you which is intended. In this sentence, it most naturally means important documents in general.
You could say 중요한 문서들은 to make the plural more explicit, but Korean often leaves that unstated when it is already obvious.