I use Amazon Glacier for archival of multi-tracks, video footage, and personal backups. I offload to local drives and annually when its slow push it up to AWS.
Yes, the prices and configuration can be a little head-scratching the first time but it otherwise works as advertised. "Thawing" a file/folder out is relatively straight forward - just has a time period to wait.
Previously I used their AWS Snowball appliance - they send a large gray yeti cooler with some I/O ports and a Kindle screen that doubles as a UPS label. Mostly recently I've used AWS Snowcone device which was a smaller 8TB rugged drive, $60 for 5 day "rental" and no data transfer fees in. They've improved the software and user experience so no more command line interaction is required.
https://aws.amazon.com/snowballhttps://aws.amazon.com/snowconeYou can also pre-config the settings on the bucket the inbound data is coming into so the files immediately transitions into deep Glacier storage. I found AWS Support to be very helpful in ensuring I had it setup properly to minimize my bill.