Space-f lets you open a file in the current workspace, and :open /path always let’s you open any file on the computer
Is this a file tree, or just a fuzzy finder?
Fuzzy finders aren't a substitute for a file tree picker. They're only great, until you don't know the name of a file, or until you need to know of a file's existence in the first place.
Dude, I would just 2d print the png they sent and give them the piece of paper.
If they complained, I would say: "I literally printed the thing you told me to print."