Use correct rights

[Dark6846 2]

Good day together
i am very happy about ember and try to set it up on raspbian currently, after it worked fine in windows. my problem is the permissions of the folder structure though.
My noticed bug:
My folder structure for the movies is /media/pi/Mainstoragedrive/emby/movies/dvd/
If I want to add the folder in Emby. This folder is on my external drive. I can click through to "pi" and then the dropdown menu always closes. It is also not possible to add manually "The path could not be found. Please ensure the path is valid and try again.
I am very helpless about rights.

Question 1: Do I only have to specify the destination folder with user "emby" or the whole path?
Question 2: Which rights/groups are necessary?
Question 3: Why is it not possible?

My rights look like this. Folder then right.
pi drwxr-x---+ 3 root root (what does "+" mean? I can't find anything on the internet
Mainstoragedrive drwxr-xr-x 4 pi root
emby drwxr-xr-x 6 pi root
movies drwxr-xr-x 4 pi pi
dvd drw-rw---- 55 pi pi

I hope that someone can help me so that I can go to bed smarter.
Have a nice weekend.

[Luke 39617]

Hi there, have you taken a look at our file permissions guide?

https://emby.media/community/index.php?/topic/32218-file-permissions-guide-for-new-linux-users/?view=getnewpost

Please let us know if this helps. Thanks.