I am trying to PUT a file into a remote directory but the file in the remote directory is always truncated to 64KB.

I have tried using both pysftp and paramiko to do the transfer as shown below

Code snippet using paramiko

import paramiko                 
ssh_client =paramiko.SSHClient()
ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh_client.connect(hostname=hostname,username=username, password=password)

ftp_client=ssh_client.open_sftp()

response = ftp_client.put(output_file, remote_dir + "/" + os.path.basename(output_file), callback=None, confirm=True) 
ftp_client.close()

print(response)

I see the following response

Actual size of the file

File size in remote directory

Code snippet using pysftp

with pysftp.Connection(hostname, username=username, password=password,  cnopts=cnopts) as sftp:

    channel = sftp.sftp_client.get_channel()
    channel.out_window_size += os.stat(output_file).st_size
    sftp.put(output_file, remote_dir + "/" + os.path.basename(output_file),  preserve_mtime=True )
    sftp.close()

Actual size of file

File size in remote directory

As seen above in both cases the file size seems to truncate at 64KB.
Is there a way to customize the size of file being “PUT” using either of these modules?