Does using S3 for uploads mean redownloading all files when creating backups?

That setting seems to be enabled by default on my website. But regardless, are there any recommendations on how to backup s3 upload buckets efficiently?

This guide for saving backups to s3 and also archiving them to glacier makes sense when the backup is a single zip file. But my understanding of glacier costs is that they charge per file, so costs will go up drastically for unzipped bucket backups.

I’m an AWS newbie, so any advice is appreciated. Thanks!

Edit: alternatively if there’s no great simple answer, I could consider not using s3 for uploads.

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