A 2GB file filled with zeros compresses to a few kilobytes. If you are testing network bandwidth over a compressed VPN (like OpenVPN with LZO), a zero-filled file gives false-positive speed results.
While downloading is convenient, the most secure and flexible method is to generate the file yourself. This eliminates 2gb sample file
with open(file_path, "rb") as f: with tqdm(total=2147483648, unit='B', unit_scale=True, desc="Uploading") as pbar: response = requests.post(url, data=f, headers='Content-Type': 'application/octet-stream', stream=True) # Update progress manually if server doesn't support streaming callbacks A 2GB file filled with zeros compresses to a few kilobytes
Even experienced engineers make mistakes with large files. Avoid these: "rb") as f: with tqdm(total=2147483648
Always specify an absolute path to a data drive (e.g., D:\samples\ or /mnt/data/ ).