Four key features
Specs to consider when choosing
Not all cloud storage offers RAW support, so while your files will still be stored, you won’t be able to browse them to find the pictures you need.
All services offer automatic uploads; once activated you can highlight folders on your machine to be automatically uploaded to the cloud.
Although all services operate online, they’re all supported by desktop applications that enable you to monitor the storage and change options.
Back-up vs storage
Most cloud services here offer two forms of storage; automatic back-up of what you have on your HD, and more traditional file storage.