You should post your system specs. I realize you posted them on your prior wifi help request. You marked the thread solved, but I have an inkling it wasn’t corrected fully.
Do not have Android phone tethering connected when you run any network diagnostic commands:
Please post again:
inxi -Fxxxza
I also asked you to post these outputs on your prior help request (but you never did).
Please post:
We will also need far more information on your NAS setup to have any idea what the problem is.