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.
MultCloud - Multiple Cloud Storage Manager: Migrate, move, sync, copy, backup and transfer cloud files with MultCloud, which supports Dropbox, Box, Google Drive, Mega, OneDrive and FTP, etc.
Dropbox - Online Sync and File Sharing
Mover.io - Mover is a tool to migrate data between cloud storage providers quickly, securely and with little hassle. It supports all major providers and has a range of automation features to support even the largest transfers.
Google Drive - Access and sync your files anywhere
Air Explorer - Air Explorer is a software to manage all your multiple cloud drives (like Dropbox, Onedrive, Google Drive, Mega, Mediafire, Box, Hidrive, Yandex, Baidu,...) as well as WebDav and FTP connections.
Mega - Secure File Storage and collaboration