Google Cloud’s managed NFS file storage service, which several VMs or GKE clusters can mount at once to read and write the same files.
On the ACE it is the answer when several VMs need a shared file system. For SMB and enterprise features you use NetApp Volumes, and for high parallel performance in AI or HPC, Managed Lustre.
Filestore is a concept that can show up on the exam. Check the full guide to see it in context.