Access to CoreELEC via FileZilla

Hello everyone,
how can I access the root level of CoreELEC with FileZilla?
I don’t see a folder like / usr or / flash or / storage

I use coreftp lite, but I assume you install filezilla to your pc

Host: ip address
username: root
Password: coreelec
port: 22

Got it with FileZilla.
But I set up CoreElec again.