Disclaimer: I work at Backblaze. > There is no mention of the durability guarantees that s3 has. I wrote this blog post doing some of our math around this: ht

Disclaimer: I work at Backblaze. > There is no mention of the durability guarantees that s3 has. I wrote this blog post doing some of our math around this: https://www.backblaze.com/blog/cloud-storage-durability/ https://www.backblaze.com/blog/cloud-storage-durability/ But here is the thing: if you value your data, like if you will really go out of business if you lose it, then you should store three copies with AT LEAST two separate vendors. No matter how reliable any one vendor is, "stuff can happen" like your credit card is declined and the vendor deletes all of it. I would recommend you use two separate vendors like Amazon S3 and Backblaze B2, and use two separate credit cards that expire on different cycles. I believe the credentials for login should be different on those two accounts, and the same one employee shouldn't have the credentials to both. Because one disgruntled employee should NOT have the ability to put you out of business. If you want some other thoughts, here is a blog post Backblaze wrote called the "3-2-1 Backup Strategy": https://www.backblaze.com/blog/the-3-2-1-backup-strategy/ https://www.backblaze.com/blog/the-3-2-1-backup-strategy/