AEC companies (Architecture, Engineering, Construction) often deal with large design files that need to be shared across multiple offices or job sites. During collaboration among remote teams, files may need to be locked for exclusive write permission to prevent inadvertent overwriting. When remotely accessing large number of files, the old method of VPN is deemed inefficient due to WAN bandwidth and latency challenges. Cloud storage solutions such as Dropbox are also inadequate to handle the amount of changed files and file locking requirements. A new category of storage solution has emerged to address this type of application and it’s called hybrid cloud file services. The name implies that it uses a file system that spans across cloud and on premises. This is different from the Dropbox-like cloud-only file system.