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.
Snappy - Snappy is software that allows the production of screenshots from areas on a Windows desktop screen.
Dropbox - Online Sync and File Sharing
Screen Shot Tool PRO - Download this app from Microsoft Store for Windows 10, Windows 10 Team (Surface Hub), HoloLens. See screenshots, read the latest customer reviews, and compare ratings for Screen Shot Tool PRO.
Google Drive - Access and sync your files anywhere
Hidden Capture - Hidden Capture - عکسبرداری خودکار و مخفیانه از فعالیت کاربران متجاوز
Mega - Secure File Storage and collaboration