Move all files with .txt anywhere inside current folder

How about this (while sitting at F:\)?

move *\*.txt .
move *\*\*.txt .
move *\*\*\*.txt .

Do that to sufficient depth until it doesn’t find any files to move. This is something I’ve done on Linux but I think ‘.’ also works in cmd prompt for the destination. If not, use ‘F:\’

I found a free software package "File Fisher" that I think will work. Trying it now.

WIN10 has everything you need to do this built-in.

Start Powershell (right-click Start icon), and use the command:

PS F:\> Get-ChildItem -Path ".\*.txt" -Recurse | Move-Item -Destination "F:\TextFiles"

This should move all .txt extension files in your F: directory, and all sub-directories to whatever directory (folder) you specify such as 'TextFiles'.

Have you tried using the built in "file explorer"

Open file explorer, go to a folder that may have text, and in the search box type *.txt.

Right click and then up pops a box allowing you to cut, copy, etc.
I would not do a cut and past because it is too risky.
Using Copy and Paste you can build a copy into the root directory as you are attempting.

I would need to play around but with subdirectories you can usually move files up into directories above with ease.

Last I knew there was a limit to the number of files in ROOT (C:\)

Id set up a folder Text, then copy into that

Now.. I do not know if your text files are scattered over multiple folders
But for each folder in Dos.
From within the TEXT folder
Copy C:\ the full path to the folder *.txt
Then once you have verified the files copied
Go to the folder and del *.txt

I do not know if you can do it with a recursive command (All folders at once)

In windows
Open two file manager windows
Point one to c:\text

In the other do a search on .txt
Then copy (not sure this will work I really do not like Windoze)