node.js – Piping multiple large files to write stream in NodeJS

Does anyone know what the problem is that when trying to pipe to write stream multiple large files and promise does not resolve

I have this method which returns a promise, I create multiple of these and use Promise.all to resolve them all. It works fine with a few files but when I am trying to write over 900 files and some of them are about 200mb in size it get stuck and the promise all never completes.
I can see that it creates all the files but then suddenly it just gets stuck and I can see that the file size are not increasing anymore

These are csv files and I removed piping to the csv2json package but it did not help

Any ideas what the problem might be ?

async writeFile(pathToFile: string, inputStream: ReadStream, count: number): Promise<void> {
        return new Promise((resolve, reject) => {
            const wStream = fs.createWriteStream(pathToFile);
            inputStream
                /*.pipe(csv2json({
                    separator: ',',
                    dynamicTyping: true
                }))*/
                .on('end', () => {
                    console.log('file read:', pathToFile);
                })
                .on('close', () => {
                    console.log('file closed:', pathToFile);
                })
                .on('error', (err) => {
                    console.log('read err: ', err);
                    inputStream.destroy();
                    reject(err);
                })
                .pipe(wStream)
                .on('close', () => {
                    console.log('file written:', pathToFile);
                })
                .on('finish', () => {
                    resolve();
                })
                .on('error', (err) => {
                    console.log('write err: ', err);
                    wStream.close();
                    reject(err);
                });
        });
    }

-Jani