Now I can say it has a new feature/tier in preview (beta). It’s Filestore Multishares for GKE.
It’s possible to attach a number of Shares in a Filestore Enterprise instance.
IMHO Maybe, you can save costs by sharing a storage instance instead of creating that big & lonely ones.
With Filestore Multishares for GKE, you can allocate up to ten shares across a single Filestore Enterprise instance. Each share maps to a unique Persistent Volume (PV) in GKE.
Each GKE PV can range from 100GiB to 1TiB in size, offering greater flexibility for organizations that require both smaller volumes for multiple clients and multi-writer access across a shared network.
Use Filestore Multishares for GKE with the new GKE Filestore CSI driver for greater flexibility and performance.