How to debug flaky Android-to-Windows FTP connection in Windows File Explorer?

As an update, the situation has greatly improved with changing the FTP
server on the Android phone and by changing the FTP client on Windows 10.

The results are currently mixed, but these are the ad hoc observations.

- Whenever Windows 10 File Explorer doesn't connect, the Windows
"FileZilla" FTP client will connect (as will the "WinSCP" FTP client but
FileZilla has a nicer user interface than WinSCP but both work fine every
time).

- It seems that Windows 10 File Explorer doesn't connect more often when
the Android FTP Server is "ES File Explorer" ESFTP (but I need to keep
observing to make sure of that observation).

- It seems Windows 10 File Explorer is more reliable when the Android FTP
Server is "FTP Server (Free)" than when the ES File Explorer server is used
(but I need to keep observing).

So at the moment, if I use the free FileZilla client on Windows and the
free "FTP Server (Free)" on Android, everything works fine all the time.

Any setup using Windows File Explorer doesn't always work, but, with the
FTP Server (Free) on Android, Windows File Explorer has been "mostly"
reliable to the point that it's no longer a bone of contention.

I will have to observe more over time, but overall, thanks for all the
helpful suggestions, which helped me and others, and will continue to help
others in the future.

Roy Tremblay actually wrote:

- It seems Windows 10 File Explorer is more reliable when the Android FTP
Server is "FTP Server (Free)" than when the ES File Explorer server is used
(but I need to keep observing).

I think the problem is that Windows 10 File Explorer stinks when connecting
to an Android phone running any of a bunch of free FTP Servers on anonymous
FTP credentials over the local WiFi LAN.

Specifically, Windows File Explorer usually works the "first time" where
this screenshot is of the Android file system from slash (/) downward,
e.g., if you want to copy the HOSTS files across Windows and Android over
the local WiFi LAN.
https://s1.postimg.org/hze7n5uhr/ftp...erver_free.jpg

But Windows File Explorer very often (but not always) fails on subsequent
tries (tested with multiple FTP servers).

Meanwhile, FileZilla works every time (only seconds later).
https://s1.postimg.org/jfpq5axen/ftp...rver_free2.jpg

- From: Andy Burns
- Subject: How to debug flaky Android-to-Windows FTP connection in
-
- Roy Tremblay wrote:
-
- the "Username" of "anonymous" and a blank password (I've never had
- anonymous password before)
-
- In days of yore, it was traditional to use your email address as the
- password when logging on as anonymous.
-

Ah, for the gold old days Oh wait, I am replying to this on a BBS,
so some of us are still living in those days