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.
Dropbox - Online Sync and File Sharing
ginstr - ginstr is a business software that lets user create custom form-based apps for customers or employees to download, fill out, sign and return from any web device.
Google Drive - Access and sync your files anywhere
Forms Manager - Forms Manager is an online form of automation software that helps businesses build forms, manage workflows, and analyze real-time reports.
Mega - Secure File Storage and collaboration
Launchcloud - Data collection & automation made simple.