Hello. I am trying to apply deployment and I see that the whole project where I have a lot of flows will be uploaded to s3(my storage block). Why I need all this files there? I expect I have to upload only one file with flow code, right?

By default, your entire project gets uploaded, but you're 100% right that only the flow code is what's required. You can customize what gets uploaded to remote storage using the .prefectignore file.

Is it possible to specify paths I would like to upload instead of excluding?

exactly, you can cd into the directory you want to upload and send the files from there you can also upload files yourself and set --skip-upload flag to avoid uploading anything by Prefect

Thanks