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What I’m trying to do
I have created a vault on my Pcloud drive on my PC and istalled obsidian on my android How do i do to open this on my smartphone I don’t find th path to open it
You can’t. I have Pcloud also, and it is like other cloud services in that it does not allow syncing on phones. I have no idea why not. The problem is not with Obsidian it’s with the cloud service. You might try a free app like Syncthing, which is what I use. It’s free and it works. The only downside is that it is terribly hard to set up (at least I think so) and get to work correctly. The plus side is that once it is up and going it just seems to work.