If you are using a Mac and need to transfer files between your Mac and Android device, you can use the WiFi FTP Server app on your Android device and access the files on the device as a Network drive in Mac Finder. This video lists the steps in this simple setup.
If you wish to use secure communication between Mac and Android device, make sure to enable SSL from WiFi FTP Server app settings, change SSL mode to "explicit", restart app and use ftps:// as the url prefix in Mac
Get WiFi FTP Server from:
https://play.google.com/store/apps/de...
Pro version of the app:
https://play.google.com/store/apps/de...