For hosting common files it's ok. Also it is on Android too do, great to transfer files between your Windows and your phone. But if you want better security you have to subscribe a monthly offer.
Dropbox - Online Sync and File Sharing
Flickr - image and video hosting website
Google Drive - Access and sync your files anywhere
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Mega - Secure File Storage and collaboration
Google Photos - All your photos are backed up safely, organized and labeled automatically, so you can find them fast, and share them how you like.