Google Cloud Filestore - Fully-managed cloud file storage
ShareFile - Secure file sharing and sync
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.
Microsoft OneDrive for Business - First of all, we think it appropriate to make it clear for the readers, Microsoft OneDrive for Business is different from what is Microsoft OneDrive that is only a cloud storage and limited sharing service.
Igloo Software - Igloo is a modern intranet, it connects people with the information they need to do their best work.
Google Drive - Access and sync your files anywhere