Sync interface on Android

Here's the overview of interface elements on Android devices: 

1. Opens "Options" (see below).
2. Folder which stored shared files (see details) 
3. Opens sync share details (see below).
4. Backup shares (see details).

Menu on tapping "+":
Send file: sends a selected file to remote peer.
Create folder: creates a new sync share.
Add backup: let you pick a folder for backup.
Scan QR code: opens camera to scan a QR code from another peer.
Enter a key or link: let you manually enter a key to a share received from another peer.

Sync Options (1):

"Witz" (identity): opens identity details - username, fingerprint and device name and the list of linked devices. Has options to unlink current device or change device name ("MyAndroidPhone").
Folders: opens folders view
Shared links: opens the list of shared files
Setting: opens general Sync settings. See here for details
Help: opens Sync help Center
Exit: shuts Sync down correctly 

Sync share details ⓘ (3):

alx : share name, and the pencil icon  lets you rename it. It will be renamed  both - in Sync and in the filesystem
Selective Sync toggle to turn itON/OFF 
Share: let you share this folder with other peers using QR-code or clipboard (and set the sharing options).
Pause: pauses synchronization
Clear: turns all synced files on this  device into placeholders. Available only with Selective Sync ON.
Disconnect: disconnects the folder from  Sync. The folder is preserved in the  system 
Peers: shows the peer list.
Allowed network: sets the interfaces used for the share.
Details: displays information about the folder such as permission type,  size, number of synced files and path to  the folder location.
Advanced-Preferences: opens per folder settings, described below: 

Share preferences:
 

Force rescan: launches a rescan of the share
Use Archive: disables/enables file versioning. Available only for shares located on internal phone's memory. 
Overwrite changed files: option to re-download the files from the source peer if this file gets changed on the phone. This option is available for Read-only shares. Detailed description on what this option does see here.
Use relay server: enables/disables relay server. Relay servers are used when peers cannot connect directly to each other.
Use tracker server: enables/disables tracker server. Tracker server is necessary for peer discovery over WAN.
Search LAN: sets Sync to use broadcast packets in LAN for peer discovery. For successful discovery router shall also have broadcasts enabled. 
Add new host: add a predefined host. Put IP and listening port of a remote peer (see below). Phone will be connecting to that peer directly. Can be used with relay, tracker and  search LAN options being OFF.

Files list view: