A .part file is a split file that was divided into multiple parts for easier sharing or downloading. In this case, "_v_s_brim_Car-ol_2168.part4.rar" suggests that it's the 4th part of a larger file.
I came across a file titled "_v_s_brim_Car-ol_2168.part4.rar" and I'm assuming it's part of a larger file that was split into multiple parts. If you're the one sharing the file or trying to access it, I wanted to provide some helpful information.
Hello,