Files on Yandex.Disk won't get lost if your phone or computer breaks.
The best way to publish and share your files.
WeTransfer is a free service to send big or small files from A to B.
Koofr offers safe EU based cloud storage with free storage space for life and options to connect multiple cloud accounts (Dropbox, Google Drive, OneDrive) and your personal storages.
ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
Zaclys provide an easy to use ownCloud solution with 1Go free.
And also dedicated servers !
Secure File Storage and collaboration
FlowCloud is online cloud storage GET 120GB FREE!
Filestash is a modern client for FTP, SFTP, S3, WebDAV, Minio,...
Secure German online storage and file sync service. Apps for all major platforms.
Xlight FTP Server is a high performance and easy to use ftp server software for Windows.
freeSSHd, like it's name says, is a free implementation of an SSH server.