I've recently added a couple of drives to my existing Storage Pool which is made up of the following drive sizes:


The pool is set for parity.

The total pool capacity showing is 18.1TB and currently using 8.27TB however when I check the drive within Windows Explorer it reads:

Storage space (drive V) 2.76TB free of 8.26TB

Please note that I have optimized the pool.

Am I missing something here as I would assume that the 8.26TB would increase to what the total pool capacity is (18.1TB)?

Please note I can increase the "Available pool capacity" from 9.91TB to 18.1TB but I'm concerned that I'll lose all my data.

Your assistance is greatly appreciated.