Alan Holbrook wrote:

I have a home network with three Win10 computers on it. One of the three
has several external disk drives attached. All the computers can see each
other and all can access the external drives. Recently, I bought an Amazon
Firestick and attached it to a television in front of my treadmill. One of
the applications on the Firestick needs to see the external drives on the
network, but when I try to access the computer the drives are attached to,
I get a message that says that computer requires authentication and it
wants a username and password. I cannot for the life of me remember ever
setting up anything on the network to require authentication, and no
combination of usernames and passwords gets access. Can anyone help figure
out what's going on here and how I can log on to the Win10 computer from
the Firestick? Thanks...

On the Firestick, enter the logon credentials for the Windows session
that is defined on the host to which the external disks are attached.

File sharing, by default, requires authentication. A user on another
host is literally logging into the remote host (the one with the
attached external disks), so they need an account on the remote host. A
disadvantage of auto-login is that you don't enter your login
credentials, so you may forget them. I can't/won't help you hack your
Windows accounts on the remote host. If you cannot remember you own
login credentials for the Windows accounts defined on your remote host,
you'll have to reset their passwords (which requires you login under an
admin-level Windows account).

https://www.youtube.com/watch?v=ecoliBpLcDI
timemark 3:00

https://www.windowscentral.com/how-s...oup-windows-10

https://support.microsoft.com/en-us/...over-a-network

I don't use a Firestick, so I'm not aware of what protocols it uses for
file sharing. Maybe it relies on the old homegroup scheme which
disappeared in Windows 10 April 2018 update.

https://support.microsoft.com/en-us/...egroup-removed
https://www.windowscentral.com/how-s...oup-windows-10