Morning,
You would like to increase the size of your existing array. How many physical drives do you currently have and what is the array currently? Is it RAID 1, RAID 5 or RAID 10?
It is possible to enlarge a array currently set but there are limitations. Primarily depends on what type the current array is. Also if the drives are compatible.
Please feel free to chat and we can take it further.
Warm regards,
Matthew
South Africa