Unreal crashed during saving a huge model import

I have a model of a photogrammetry based building, the model has 2000000 polygons, and 325 texture file all are .jpg, importing the model into unreal revealed that it requires more RAM memory, i edited the BaseEditor.ini file to set the max allowed memory to 120 GB of RAM, for an hour unreal was importing the model with peak memory used “monitored on task manager” about 80 GB, even though the whole imported data is 2 GB (.jpg textures and .obj), it successfully imported it but after a minute the program crashed, I’ve noticed that it was trying to save the data imported and it crashed during this single step not before, to be more specific the importing loading indicator reached 100% and disappeared .

I’m new to unreal, actually I’ve never worked with it even on smaller models, but i’m not sure what are the limits of the software, on unity the same model imported successfully and it didn’t take that much time.

My importing properties are the defaults, i didn’t change anything, also i dragged the whole 325 .jpg and the .obj and the .mtl all together to the editor.

So my question is, what are the limits on UE4 that would concern my role, which is dealing with such huge amount of textures and polygons in every single model i got, and if there is anyway i could change those limits like changing the maximum allowed RAM memory for the editor, i have the setup and a very powerful PC, but it’s the editor that is making my life way too hard.

and if there’s not and it’s the way that the game engine should work, what should i change to make the model importable on UE4 without touching the details it provides on unity, because my lower limit is to display same visuals as unity.