Permanently Deleted
mergerfs combines all those drives/mounts/etc into one. so if you have e.g. “Movies” folders on two drives, the new one has one “Movies” folder with the combined contents of those two drives. when writing to this array, the files are stored where there’s (more) space. so searching stuff recursively is simple.
needless to say, there is no redundancy so if a drive dies, its conent is gone from the array.