What is the best Dropbox alternative for Linux user? I do not want Electron based sync app and do not mind paying for secure file hosting. I'm using Dropbox as remote backup server, to complement local backups, but data size is only about 100GB.
I've very happily moved over to Syncthing. For a small installation you could use a VPS at Digital Ocean or Vultr. You could even get a Raspberry Pi and a cheap external hard drive.