Glacier should be sufficient for catastrophic accidents. It's cheap to store ($1/TB/mon), the traffic costs are damn expensive ($90/TB) but you won't need to pa

Glacier should be sufficient for catastrophic accidents. It's cheap to store ($1/TB/mon), the traffic costs are damn expensive ($90/TB) but you won't need to pay for it except in catastrpohic cases. However you will need to somehow make sure you will be able to access the data when you do need it. For online storage I've found cloud S3 storages to be substantially better than customer-faceing services like Google Drive, OneDrive or Dropbox. Amazon S3 may be expensive but you can use Backblaze B2 for $6/TB/month which is as good and as fast. Then use rclone as file browser. You can share single files by generating download link so others can download at 1Gbps no hidden limits.