does not save in other path than opened files before

[snippsat]

Thonny (3.3.13) and I do not know

Get a new version of Thonny it's comes with Python 3.10 built in.

Do not use singel \ in Path for Windows,because of escape characters.
Here you clearly see the problem.

>>> f = "C:\anyOtherPathOnMyHDD\outputfile.txt"
>>> f
'C:\x07nyOtherPathOnMyHDD\\outputfile.txt'

So raw string r or just turn around / work fine.

>>> f =  r"C:\anyOtherPathOnMyHDD\outputfile.txt"
>>> f
'C:\\anyOtherPathOnMyHDD\\outputfile.txt'
>>> 
>>> f =  "C:/anyOtherPathOnMyHDD/outputfile.txt"
>>> f
'C:/anyOtherPathOnMyHDD/outputfile.txt'

The basic of open and write files,and use with open then do not need to close file.

with open(r'G:\div_code\hello.txt') as fp:
    result = fp.read()
    print(result)

# Add 123 to hello world
with open(r'G:\div_code\new_hello.txt', 'w') as fp_out:
    add_numb = f'{result} 123'
    fp_out.write(add_numb)

Output:
hello world

---

hello.txt:

Output:
hello world

new_hello.txt:

Output:
hello world 123