How to upload file not use S3 Next js? Please, example

file: course.router.ts / import { CourseSchema } from "~/schema/post.schema";
import {
createTRPCRouter,
publicProcedure,
protectedProcedure,
} from "~/server/api/trpc";
import formidable from "formidable";
import fs from "npm";

export const courseRouter = createTRPCRouter({
create: protectedProcedure.input(CourseSchema).mutation(({ ctx, input }) => {
//upload and save here
input.file ////

// throw new TRPCError({ code: "INTERNAL_SERVER_ERROR" });
return ctx.prisma.curse.create({
data: {
name: input.name,
video: input.video,
descriptionCurse: input.descriptionCurse,
},
});
}),
});

this video might help you out: https://youtu.be/mxT3j-5s1Zc