Pick the cheapest for archival.
S3 storage classes (cheapest → most expensive to retrieve):
Glacier Deep Archive ~$0.001 / GB / month, 12 h restore
Glacier Flexible ~$0.004 / GB / month, minutes-hours restore
Standard-IA rare access
Standard hot, milliseconds
Old quarterly compliance reports nobody reads but must be kept 7 years.
Cheapest sensible class?
A) Standard B) Standard-IA C) Glacier Deep Archive D) Glacier Flexible
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