okay, I will try it with port

yes. we upload artifacts to Yandex.Cloud S3 using ClearML. we set " s3://storage.yandexcloud.net/clearml-models " as output uri parameter and add this section to the config:
{
host: " http://storage.yandexcloud.net "
key: "KEY"
secret:"SECRET_KEY",
secure: true
}

this works like a charm. but download button in UI is not working

I wonder if this hack would work
Assume you upload an artifact/model to ' s3://storage.yandexcloud.net:443/clearml-models ' notice the port is added. Would that trigger a popup in the UI?
Also what happens if you add tge credential manually in the profile page?

after the very first click, there is a popup with credentials request. nothing happens after that

even without port

https://cloud.yandex.com/en-ru/docs/storage/s3/

Wait, with the Port it does not work?
Notice that since this is external S3 you have to have the port specified so it Knows this is not an AWS S3 but a different compatible service

Hmmm is this s3 compatible?