For hosting common files it's ok. Also it is on Android too do, great to transfer files between your Windows and your phone. But if you want better security you have to subscribe a monthly offer.
Titanium Backup - Titanium Backup is a very old backup app that has been around since the early days of Android. In fact, it's one of the few apps that covers all versions from 1. Read more about Titanium Backup.
Dropbox - Online Sync and File Sharing
Wondershare MobileTrans - Wondershare MobileTrans is a 1-Click Phone to Phone Transfer for you to move data between devices with different operating systems. Your must-have phone Transfer.
Google Drive - Access and sync your files anywhere
Samsung Smart Switch - Samsung Smart Switch is software that allows the user to transfer files and information from one smart phone to a Samsung Galaxy device.
Mega - Secure File Storage and collaboration