Android 6.0 FTP server with external SD card write support? I have a Samsung Galaxy S5 phone with Android 6.0.1.

After upgrading to 6.0.1 (from 5.0), none of the FTP servers I've tried can write to external SD card. The only one that sort of works is FTPDroid, but it requires root to do that and doesn't work anymore since I reset my phone (and it's an outdated piece of software).

Does anyone know of a server that can do that?

Thanks
For my case SwiFTP is working fine.