Compliance initiatives almost always want logs for 1 year. Keeping logs longer than that can be a legal liability should something happen at your company. If you have the logs you will be required to look at them, should you need to investigate. This also helps with cost of storing your data in S3. If you don't lifecycle the logs out, consider moving them to a different class of storage like glacier to cut cost.

Always

S3

Medium

AWS

Will Bengtson