Hiding the files may create problems with future edits. What software are you using to edit video?
Open an elevated command prompt and navigate to your video directory type:
attrib +h *.nfo /s
Replacing .nfo with the file extension you want to hide.
This will hide the files, however if you have show hidden files turned on they will still show up.
This is NOT exactly the answer to the question "hide any files with the.sfk extention from here on out
That attrib command only hides current files, NOT any of these files that the editor problems continue to create into the future
(ie every time you do a new import from camera on another day)
What we want is a way of telling Windows that ALL ".blah" files should ALWAYS be hidden, not just seeting the hidden flag on existing files, but setting it on future created files too.
So how do we do that in Windows 7?