$ df -hFS Usage between 50 % and 80 % is generally considered healthy for most workloads.
If FS Usage is consistently above 80 %, it may indicate that the server is is running out of storage space. This can lead to performance issues, application failures, and potential data loss. In such cases, it is recommended to either clean up unnecessary files, expand the partition size, or migrate to a larger storage solution.
Conversely, if FS Usage is consistently below 50 %, the server may have excess storage space. It might be possible to downsize allocated storage or move to a smaller instance type to reduce costs.