You can upgrade your storage plan by adding storage add-ons to your account via the Subscription tab as shown in the video tutorial below.
Go to your profile on the top right of the screen.
Click on Settings.
Click on Subscription under Plans & Billing on the left of the screen.
Click on Manage Storage.
Add the storage that you need and you will have how much to pay extra monthly.
Click on Update to finalize.
Or if you want a more customized storage plan you can contact us via chat or on our email firstname.lastname@example.org