Idle EFS file system

An EFS file system with no or near-zero read/write activity still incurring storage charges.

Last updated July 6, 2026

What triggers this finding

An EFS file system with no or near-zero read/write throughput over the lookback window.

Delete the file system if no workloads mount it. Confirm EC2 instances and Lambda functions no longer depend on it.

100% of storage charges — scales with stored data (e.g. $0.30/GB-month for Standard storage).

See also: Severity and savings estimates for how Parsivex calculates figures on your report.

Plain-English definitions for all 13 Parsivex waste finding types, grouped by AWS category.

How to review warnings, use dry-run commands, test in non-production, and avoid destructive mistakes — especially with S3 lifecycle scripts.

How Parsivex prioritizes findings, calculates monthly savings figures, and why estimates are not guarantees.