Thanks for taking the time to review SFTPCloud :)

I would like to mention that the review does not seem to be about what we offer (SFTP & FTP as a service) and more about how cheap the storage is & shareable links/file previews. We offer cloud-powered SFTP & FTP (and soon WebDAV) as a service that can also act as a gateway on top of your own storage. We are not a file-sharing service like Koofr, Icedrive, etc (which are not offering FTP/SFTP) even if we will add shareable links, browser file uploads & improve our web-based client to offer similar features which are built on top of our core offer (SFTP & FTP).

If all you need is storage as cheap as possible and you don't have requirements on the protocols (in this case SFTP & FTP), features (user-level permissions, quotas, an overview of connections in real-time, key-based auth, etc), and scalability then SFTPCloud may not be what you are looking for :)

Regarding the file previews, it depends on the client you are using. You could try this open-source client we are hosting which has support for file previews: https://client.sftpcloud.io

Regarding "Are there far better solutions in the market lifetime? Yes", could you provide a single example of another service offering FTP & SFTP as a service in a lifetime deal? I don't think there is any other company offering it :)