This article explains how to resize the backup package that is available for your backups.
Click the Actions drop-down menu.
Select the package you want. You can choose either a package with a fixed amount of storage space or the pay-per-use package.
If you choose the pay-per-use package, you only pay for the storage space you use. If you choose a package with a fixed storage space size and use all the storage space, you pay $0.12 per month for each additional GB.
Click Resize Backup Package.
The amount of the backup storage available has now been adjusted.