Copy, paste and sync your files without rooting
Author: Jay Feldman
Date: 12 Apr 2017, tested on Samsung SM-G920F Galaxy S6
Interesting functionality, various features, simple design
Weak functionality, non-intuitive interface, old fashioned design
FolderSync aims to let you share files across platforms and devices. It works with Box, Amazon Cloud Drive, Dropbox, Google Drive, OneDrive, Yandex, and a host of others. To set up your various accounts, you'll need to sign in with your user name and password and grant the app permission to access. You can create folders within your Android OS with ease, and even browse your gizmo's innards without rooting, though it apparently also supports root access if you have chosen to go down that road. You can easily earmark which folders to sync and the app will handle the rest for you, similar to how Dropbox can sync certain desktop folders and always keeps them current online. The app also functions with SD cards.
The app layout and presentation is nothing special; just a collection of vertical lists that display in portrait or landscape, and populated with plain text on a grey background. I'm hard pressed to call any of it intuitive or innovative. This might be especially helpful for syncing photos and music, however, there's better apps out there to fill that void. I was particularly fond of the copy and paste function, though it was a tad slow and laggy, depending on how many files you are copying.
FolderSync is decent at what it does but is in dire need of a cosmetic makeover. It functions well enough, but there's dozens of apps that offer all this functionality, and more, all within a far more innovative and intuitive interface. This one is just decent.