Descriptions : This app is an automatic tool for synchronizing and backing up files. Allows you to sync files and folders with Dropbox cloud storage and your other devices. It is an ideal tool for syncing photos, backing up document files, auto-file transferring, automatic file sharing, ...
Features :

+ Sync multiple pairs of folders
+ Upload files larger than 10 MB
+ Intelligent change detection (fast sync!)
+ Sync your entire cloud account with a folder on your device
+ Synchronize with multiple accounts
+ Protect the app settings with a passcode
+ There are no ads in the app
+ Email support from developers
+ Full bi-directional automatic synchronization of files and folders
+ Many synchronization modes.
+ Very efficient, uses almost no battery

Required Android Versions :ÂIce Cream Sandwich [4.0.3–4.0.4] - Jelly Bean [4.1–4.3.1] - KitKat [4.4–4.4.4] - Lollipop [5.0–5.0.2] - Marshmallow [6.0 - 6.0.1] - Nougat [7.0 – 7.1.1] - Oreo [8.0-8.1]

Download Autosync for Dropbox Dropsync v4.4.6 APK Ultimate Free