CS-WX1.0 upgrade current 1Tb Raid 1 to 2 Tb raid 1 without loosing data

[regnets1]

Hello,
     I am looking for some clarification.  The manual seems a bit unclear on how to swap a healthy drive for another.  I have a CS-WX1.0 running two 1 Tb drives in raid 1 configuration.  I am running out of space, and need to upgrade to 2 Tb drives without loosing any data.  The manual has information on replacing a failed drive:

To replace a failed drive, go to the local user interface at http://x.x.x.x, where x.x.x.x is the IP
address of your CloudStor. See which drive failed. Turn off the CloudStor and replace the bad
drive. Turn the CloudStor back on and let it boot up. In the local user interface, click on After
replacing the drive, click here. The array will be rebuilt.

The next paragraph on page 40 of the user manual details the process for "removing a drive that has not failed:

To remove a drive that has not failed, put the drives into Independent mode. In the local user
interface, select that drive to remove and click on remove disk. Power down the CloudStor and
physically remove the drive.

Sounds very straight forward right?? Well after those two sections copied directly from the manual, are an explanation of RAID 1 and independent mode.  Now here is what scares me, right below the explanation of RAID 1 is this little excerpt:

When changing from Independent mode to RAID 1, you have three options:
Keep the data from disk 1 (left drive in chassis)
Keep the data from disk 2 (right drive in chassis)
Don't keep any data
When changing from RAID 1 to Independent Mode, all data is lost.

This leads me to believe that the manual is referring to simply removing a drive from the NAS without replacing it. (why would anyone do that?) Perhaps, I am being a little too cautious, but I simply cannot loose an entire Terra-byte of data, so I need some reassurance that I am understanding the process fully before I do anything to the NAS. 
I think the process should be:
1: turn off the CS-WX1.0/D
2: remove drive #2
3: replace with new drive
4: turn on CS-WX1.0D
5: enter user interface, click on "After replacing the drive, click here"
6: once the Array is rebuilt, repeat the process for drive #1

If anyone can confirm I am on the right track here, I would greatly appretiate it.

Thanks,
Robert

[davo]

 You cannot upgrade the capacity of the unit without erasing the data on it.

[regnets1]

Davo, thanks for the reply, although I have to admit it was not what I wanted to hear.  So even if I were to insert a 2 Tb drive into one of the bays, the CS-WX will only build the array to the original size (1 Tb)?  Which now that I type it out, makes sense.  So I suppose the only alternative would be to purchase a new enclosure and setup a totally new NAS with larger drives and then copy my data over once it's operational.