I’ve been using the feature: External data --> find missing files a lot recently.
It’s been a real lifesaver. Unfortunately this feature can’t search in subfolders.
I have a texture folder with many subfolders, metals, wood, skies, hdri, etc… you get the idea. 
the way I have to work now is I have to manually navigate to each folder, then do a search for the textures. This is very cumbersome. Ik would simply like to navigate to the root folder of my texture library and then search every subfolder in one go.
Is there a way to do that?