Windows need help for Large text file editing for remove duplicates – combine txt work on 50GB+

i have windows 2012
32GB RAM
I7 CPU Prossesor
1TB SSHD

i have .txt files of wordlists in lines the txt files start from 2GB to 50GB

what kind of tools or program can work in that large size/lines
to combine all files to 1 file .txt
then work in that 1 file .txt which can be 100GB after all combined/merged

to remove duplicates lines with CauseSinstive and don't crash or freeze or lag ?
i know i asked a question look like that but i didn't get anything simple to

help me i don't understand so much in the cmd codes people use
so if possible someone tell me about a program can really do that without a problem or a cmd way with easy explain for beginner

like what i need to do by steps and how to do
so at the end i need something don't crash my pc or be very slow

i have tryied emeditor so far can't work in 10GB file and its got starting super slow
please help me