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.
Workday - Workday is an on‑demand financial management and human capital management software solution.
Dropbox - Online Sync and File Sharing
Paylocity - Paylocity has revolutionized the industry and has quickly become the leading independent provider of online payroll services and HR solutions.
Google Drive - Access and sync your files anywhere
Paycom - Paycom is a Human Capital Management system that helps companies manage the complete employment life cycle, from recruitment to retirement.
Mega - Secure File Storage and collaboration