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.
Square - Square helps millions of sellers run their business-from secure credit card processing to point of sale solutions. Get paid faster with Square. Sign up today!
Dropbox - Online Sync and File Sharing
Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
Google Drive - Access and sync your files anywhere
ITSCircle POS - ITSCircle POS is a point of sale solution for retail stores.
Mega - Secure File Storage and collaboration