get all the files in the path in a list?

[snippsat]

To put together i would do it like this.
So a own function that yield files that paths now convert to strings

from pathlib import Path
from os import fspath

def read_files(path_os):
    for path in Path(path_os).rglob('*'):
        if path.is_file():
            yield fspath(path)

def upload_script(file_upload):
    for file in file_upload:
        print(file)

    '''UploadOk = "Problem"
    ftp = FTP(routerIP, timeout=60)
    try:
        ftp.login(user=username, passwd=password)
    except error_perm as msg:
        print(f"FTP error: {msg}")
        return "Wrong User or Password"
    except Exception as e1:
        print(e1)
        print("Error in FTP Login!")
        return "Unknown Error"
    else:
        try:
            ftp.storbinary('STOR ' + nameOnRouter, open(filename, 'rb'))
            UploadOk = "OK"
            return "FTP success"
        except Exception as e:
            print('my error')
            print(e)
            UploadOk = "Problem"
            return "FTP Error " + str(e)
        finally:
            print('done with  ' + nameOnRouter + " status " + UploadOk)'''

if __name__ == '__main__':
    path_os = r'G:\div_code\all_files'
    path_os = read_files(path_os)
    upload_script(path_os)

Output:
G:\div_code\all_files\all_file_req.py
G:\div_code\all_files\Nytt Adobe Photoshop Image 22.psd
G:\div_code\all_files\foo\Articles.csv
G:\div_code\all_files\Ny mappe\Nytt tekstdokument.txt

Try to not use CamelCase in Python write it like this.

UploadOk # No
upload_ok # yes

Look into f-string.

# No
print('done with  ' + nameOnRouter + " status " + UploadOk)

# Yes
print(f'done with {name_on_router} status {upload_ok}')