It is possible to grant ftp access to files outside the home directory of the user.
**Uncomment or add the following : **
Now create a directory to mount the folder to users home directory which you want to grant access to:
mount --bind /folder/to/grant/access/ /home/username/extraaccess
[–bind option is used to remount a subtree somewhere else]
In order to make this permanent include this in the fstab:
/folder/to/grant/access/ /home/username/extraaccess none bind 0 0