@Roger Roger
I understanding you are wanting to expand your data disk from 2TiB to 5TiB preferably without downtime.
Unfortunately, this is not possible at this time, disks smaller than 4 TiB can't be expanded to 4 TiB or larger without downtime. You could expand to 4TiB without downtime, or you could add a second data disk to meet your needs. More information can be found on our documentation page.
Hope this helps! Let us know if you have further questions or need assistance.
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