Most files on an EFS file system are rarely accessed. Which feature reduces cost automatically without moving files to another service?
A.EFS lifecycle management to the Infrequent Access storage class
Correct. EFS IA lifecycle is the native, automatic cost optimization.
B.Migrate all files to S3 Glacier
Glacier migration breaks the shared file-system access pattern.
C.Provisioned throughput mode
Provisioned throughput increases cost; it doesn't reduce storage cost.
D.EBS snapshots
Snapshots are for backup, not storage-class cost reduction.
Why this answer
EFS lifecycle management automatically moves files not accessed for a set period into EFS Infrequent Access (or Archive), which costs a fraction of Standard — seamless and invisible to applications.
Correct answer: A · Last reviewed 2026-10-25
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