Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
OwnDrive - OwnDrive is a web-based storage platform allowing the professionals, enterprises, and individuals to easily upload, store, backup, share and collaborate on their files and data with others.
Google Cloud Filestore - Fully-managed cloud file storage
Dropbox - Online Sync and File Sharing
Azure File Storage - Try Azure File Storage for managed file shares that use standard SMB 3.0 protocol. Share data with on-premises and cloud servers, integrate with apps, and more.
Google Drive - Access and sync your files anywhere