I go to Drive:/folder/folder/folder I then go back to root I would like the tree to collapse as I go back. This does not happen. Instead it remains open until I go somewhere new. Furthermore when I reopen the last drive I accessed the entire tree is still open
I see. Yes, it won't collapse when you just go up a level in the branch you're already in.
I think if it did it might turn out to be quite annoying though, since it would make it difficult to go up and then into a sibling folder of the one you were just in, which is very common.
There is still a way to do this, which I often do and that's to select a sibling of the higher-level folder. So, if you were in A --> AA --> AAA and you want to go up to A but not see AA and AAA anymore, you can just switch to B and then back to A.
@Leo, sometimes this is needful when you have quite a long list of folders in a sub-folder. If we don't collapse that branch, we end up scrolling a lot to see where we want to swtich to next.