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.
TestRail - TestRail provides comprehensive test case management for software testing. Organize your testing, boost productivity, get real-time insights, and track progress toward milestones. Integrates with leading issue tracking and test automation tools.
Dropbox - Online Sync and File Sharing
LambdaTest - Perform Web Testing on 2000+ Browsers & OS
Google Drive - Access and sync your files anywhere
PractiTest - PractiTest is a cloud based Innovative test management tool.
Mega - Secure File Storage and collaboration