Gracias!

Hello Dayana Lo que Sam escribí es corecto 근데 is a short form of 그런데 Quiere decir la misma cosa como 하지만 하지만 es más formal Sam tiene razon!!

I didn't know 근데 was a contraction of 그런데 haja Anyways I have to study more to understand their usage better. Thank you Sam!

I also have wondered that a lot but from what I understand, 하지만 seems to be more formal and also is for like a very noticeable change in direction of the sentence (like a strong 'but'), whereas 근데 is usually used just in conversation. They can both be combined with verbs as well instead of standing alone like I want to eat but... 나는 먹고 싶어 하지만 its more natural (less strong) to say 먹고 싶지만 Usually when writing some essay we use 하지만 forms instead of 근데 forms. In that case like 먹는데 is giving background information instead of being 'but'. 근데 is shortened form of 그런데 which would be the proper way to use it in writing I think. But this is all just based on my observation. My teacher always told me I used 는데 too much in my essays and said 지만 is better.