SFTP Server s0 v1 is an Android Secure File Transfer Protocol Server App, compatible with all Android devices down to Android Version 4.4/5.0* “KitKat/Lollipop*” (API Level 19/21*), covering more than 99.9% of all android devices world-wide. *)Mounting of drives (document providers) & directories using Android Scoped Storage requires at least Android Version 5.0 “Lollipop” (API Level 21) SFTP Server s0 v1 offers automatic public key handling according to preference settings. SFTP Server s0 v1