This topic describes how to upgrade an Apsara File Storage NAS (NAS) resource plan. You cannot downgrade a NAS resource plan.
Log on to the NAS console.
In the left-side navigation pane, click Resource Plans.
In the top navigation bar, select a region.
On the Resource Plans page, find the resource plan and click Upgrade in the Actions column.
On the Upgrade page, select a new base storage capacity for the resource plan.
Check the resource plan configurations, read and select Resource Plan Agreement of Service, and then click Pay.
Confirm the order and click Buy.