Mount a FTP map in the linux filesystem tree.
first in a terminal:
sudo apt-get install curlftpfs
sudo mkdir /media/provider
Add this line in /etc/fstab
curlftpfs#username:firstname.lastname@example.org/PUBLIC /media/provider fuse rw,allow_other,noauto,user 0 0
where username is your login name at your providers ftp site
password is your password
@fpt.provider.com/ is the ftp server of toyr provider
PUBLIC is the map in your ftp account to use.
/media/provider is the map you created earlier. Here you'll mount your ftp site.
And reboot of type in a terminal (sudo mount -a)
than when you want to mount the ftp site type in a terminal:
sudo mount /media/provider
Note that the speed of FTP is very slow compared with normal hard disk usage. About 500 k per second on a drive on your own router.
It is possible to use for an network harddisk, but if smbfs is available, that's better to use. That's explained here.
Additional information is found here.