Not yet adapted to the changes in Android 6. Good for earlier versions EDIT: So, I've found a workaround. It's actually two bugs. tl;dr: Select "custom root" and select the root directory of your sd-card to get access Bug1: When you select "External SD-Card" as ftp-root directory you are only presented with an empty folder on the SD-Card owned by the app. "/storage/<your-sd-cardname>/Android/data/com.theolivetreee.ftpserver/files". While technically it's on the external sd-card, that's hardly what I would have expected. Bug2: When you select "Root (/)" as ftp-root directory you can change dir to /storage/<your-sd-cardname>/ but you have no permissions to put or remove files or create directories there. Workaround: Select "Custom root" and in the option directly below select the root directory of your sd-card. Now you can upload files to your sd-card, but to your sd-card only. To change upload to somewhere else, change the setting again. Also you still can't delete files which you have not previously uploaded.
This is Definitely the best Ftp app ive been looking for on the entire playstore
Simple, straightforward, complete, easy to use.
Not stable. Two errors while transferring 1 GB files.
Good tool to upload in SD card
Add TalkBack description in Start/Stop button and Widget.
Fix widget size
Request external storage permissions on Android 6