Wasabi is S3 compatible storage and costs $6/TB per month. NextCloud and ownCloud can be set up to utilize Amazon S3 or Wasabi storage. This works really well

Wasabi is S3 compatible storage and costs $6/TB per month. NextCloud and ownCloud can be set up to utilize Amazon S3 or Wasabi storage. This works really well and is very inexpensive. Both my GFs business files and my personal/work files all are backed up Dropbox style for less then $10 a month including web and mobile access. I found NextCloud a little buggy compared to OwnCloud but it has more features and unfortunately I'm stuck with it for the time being and can't easily switch back to NextCloud. The sync works fine though.