best way to copy a big binary file

[snippsat]

i also want to be able to output a progress indicator

Use tqdm A Fast, Extensible Progress Bar for Python and CLI.
If i write a test,also rewrite previous code to use for loop bye using functools.partial.

from functools import partial
from tqdm import tqdm
import os

def file_copy(file_name, path_out, buffer_size=1024000):
    with tqdm(total=os.path.getsize(file_name), unit='B', unit_scale=True) as pbar:
        with open(file_name, 'rb') as fsrc,open(f'{path_out}/{file_name}', 'wb') as fdst:
                for byte in tqdm(iter(partial(fsrc.read, buffer_size), b'')):
                    fdst.write(byte)
                    pbar.update(len(byte))

if __name__ == '__main__':
    path_out = 'C:/code/out'
    file_name = '2.1GB.rar'
    file_copy(file_name, path_out)

Okay speed(6-sec for 2.1GB) with this buffer size as i have set to default.