Storage providers not recognised

[I do not understand that Tag system; I have to add one, but the choices are poor, and I cannot define my own one? Hmmm…]

I am trying to get Cloudflare R2 and Cloudinary installed and running, but it does not work. Or that’S what I thought at least! Because the storages were actually donfigured correctly, but Directus has this STORAGE_LOCATIONS const, which I used like this: local,test,rs,cloudinary. Nowhere did I read that order is important! After almost 2 days, and only “just for fun”, I moved cloudinary first. And voilá - it worked!

Where is this documented?

Does Directus have a tool that allows me to select the storage I’d like to upload to?

Maybe this is just me and my old blind eyes, but could it be that this topic is rather “unwell” documented? Or where would I have to read to understand properly? Thank you!