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.
HammerTech - Construction Safety Software
Dropbox - Online Sync and File Sharing
Mitratech Compliance Manager (CMO) - Mitratech Compliance Manager (CMO) is software that gives HSE management solutions.
Google Drive - Access and sync your files anywhere
ComplianceQuest - CQ Comprehensive EQMS and HSEQ or QHSE Software is 100% cloud-based compliance software system & solution, built and run on the Salesforce platform.
Mega - Secure File Storage and collaboration