How to extend cache expire time?

some sites have 1 year expire time; Screenshot by Lightshot

mine is only 5-6 hour

i tryed
cache everything + edge cache ttl 1 month
or
browser cache 1 year
but nothing happened

This comes up nearly every day. Edge Cache is not a guarantee. It’s a max setting for how long it’s safe to cache that resource. It will get evicted early if it’s infrequently used.

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