/Local-Src: /mnt/disk1/apps/filezilla/SRC
/Fetched-Files: /mnt/disk1/apps/filezilla/FETCHD
/nobody/.config/filezilla: /mnt/disk1/apps/filezilla/CONFIG
I think you're right. "/mnt" makes sense now. I do not know how to point it to another folder outside docker though. I'll read more about it, maybe start the docker newbies post
EDIT: after reading the forums it all makes sense now. Here are the tips I got that helped me may help other newbies too.
*do not use /mnt/disk1/ as it may lead to issues
*add folders (containers) in the plexmediaserver settings, otherwise the app cant access it
*use /mnt/user/ (again not /mnt/disk1)
Thanks @trurl for your quick responses