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.
Restic - Easy: Doing backups should be a frictionless process, otherwise you are tempted to skip it.
Dropbox - Online Sync and File Sharing
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
Google Drive - Access and sync your files anywhere
rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.
Mega - Secure File Storage and collaboration