Terrain "Creating System" consuming infinite memory [Please Help]

First of all, Im new to Unity, I have been working on a game for a week and I didnt have any problem... until now.

I wanted to create my terrain and tried using the Terrain creator that Unity provides. (I didnt make any changes in the settings.) When I added the terrain to my game (just the plane, no edits on it) and it immediatly started consuming memory for no reason. It wasnt 5, 10, 50mb but 200mb... it doesnt seems right to me. I noticed that at the bottom it was saying "Creating System", I waited 5min and it stopped (btw 300mb used). Then when i was going to edit the terrain it started "Creating System" again. I waited as before and another 300mb was used. And now every time I delete the terrain and add another it consumes + 200mb.

I dont know if Im doing anything wrong but I cant figure out a reason to why this is happening.

Also I tried searching for the place that Unity was storing the "Creating System" so I can delete it and restore my 800mb but i cant find it. I dont know if that is a file or it is saving into the Unity.exe... no idea.

My Unity version is 2019.4.0f1 (Using Windows 8). If someone can help me with this I would be so gratefull. I tried searching for answers but I havent found any solutions for my problem yet.