The FileCloud server is self-hosted and gives me the ability to store and share files, sync across different devices and back-up all documents and photos so that I don't have to worry about security.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Dropbox - Online Sync and File Sharing
ExpanDrive - ExpanDrive is a fast network drive and browser for cloud storage.
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
WebDrive - WebDrive File Access Client allows you to open and edit server-based files without the additional step of downloading the file.
Nextcloud - With Nextcloud enterprises host their own secure cloud solution for storage, collaboration & communication from any device, anywhere.