Inexpensive cloud service for storing web server backups, what to choose?

Question

System administration

Need an inexpensive cloud service for storing backups. It is planned to upload files via ftp. You need about 1TB for storage. Now there are two servers from which you need to store backups, but there will be more of them. I read
this habrahabr.ru/company/selectel/blog/168249 . What other options?

Answer 1

maybe it will be cheaper to take an ip and deploy an ftp server?

Answer 2

I use Yandex.Disk, but there is webdav (if the official client does not start)

Answer 3

We are preparing this service.
cost from 3 to 4 rubles per gigabyte would suit?
Access via ftp, sftp, nfs.