MEGA is a secure cloud storage service with 50 GB free storage space. Inside the app you can upgrade your storage space & bandwidth quota by subscribing to MEGA Pro with a monthly or yearly subscription. Subscriptions are €9.99 (US$10.99) per month or €99.99 (US$119.99) per year. This subscription gives you 500 GB of storage space and 1000 GB of bandwidth per month.
The app provides access to all your files in the cloud, letting you select which ones you would liked saved locally.
You can download MEGA from the App Store for free.