If you are trying to setup the “Network Storage” option in HA. It only seems to be able to go to the root of the SMB share. In your case 192.168.1.1/sda1.
I suppose you mean the Network Storage option that has been introduced with Home Assistant version 2023.6?
It seems like you are confusing FTP with SMB: these are different network protocols.
The Network Storage option only supports two network protocols: SMB and NFS:
So FTP is not supported.
I am not aware of any option for Home Assistant to access data on a FTP-server. Anyone else?
Can you setup a SMB share for your network storage?