Learn Hardcore Korean: jungyohan sajineun dareun poldeo-e baegeophago cheombupaireun dasi bonaesseo. - I backed up the important photos in another folder and sent the attachment again.

중요한 사진은 다른 폴더에 백업하고 첨부파일은 다시 보냈어.jungyohan sajineun dareun poldeo-e baegeophago cheombupaireun dasi bonaesseo.

I backed up the important photos in another folder and sent the attachment again.

Breakdown of jungyohan sajineun dareun poldeo-e baegeophago cheombupaireun dasi bonaesseo.

Questions & Answers about jungyohan sajineun dareun poldeo-e baegeophago cheombupaireun dasi bonaesseo.

Why are 은 used on both 사진 and 첨부파일?

Here, 사진은 and 첨부파일은 both use the topic particle 은.

This does a couple of things:

It marks each noun as something the speaker is talking about.
It can create a slight contrast between the two items.

So the sentence feels like:

As for the important photos, I backed them up to another folder,
and as for the attached file, I sent it again.

Using 은 twice helps separate the sentence into two parallel parts.

Why isn’t there an object particle like 을/를 after 사진 or 첨부파일?

Because those nouns are being presented as topics, not simply as direct objects.

Compare the difference:

중요한 사진은 다른 폴더에 백업하고...
- As for the important photos...
중요한 사진을 다른 폴더에 백업하고...
- more directly (I) backed up the important photos...

Korean often drops or changes particles depending on what the speaker wants to emphasize. Here, the sentence is structured around two topics, so 은 is natural.

How does 중요한 work? Why not 중요하다 사진?