I wanted to test the ext4, via share samba. but he asks me for a password that I do not have and if I disable the option I can not write authorization. in ntfs no problem
the solution is in ssh it's 2 commands: chmod -R 777 / mnt / sda1 -> (adapted to the name of your drive) chown -R nobody / mnt / sda1 -> (adapted according to the name of your drive) otherwise a problem with openwrt it does not keep in memory the information contained in / etc / config / fstab because I would like to enable the 'option' enabled_fsck '' 1 'on ext4. it must be also a problem of access to the file, I still have to check.