Just save one again, an action or whatever, and watch which directory it saves to at that time...to find it.

I've seen that matrix one a few times before, but yeah...all could go nice when molded in with something else (text, pictures etc), with a border too. Just curious, have you ever tried 3DSM?
The biggest problem with those tutorials is...at least from what I've seen is people follow them, but it takes so long to do that each time, whereas it'd be so nice to know how to do it from memory

! Not that it's possible....but yeah, fun!...to try, haha. Wouldn't it be amazing to memorize every tool in that program?