Drive replacement in DS923+

[Enquiries]

I have a 4 bay NAS of 8TB/each. They are all Healthy and in good working status. I'd like to upgrade/change one HD for a 20TB. I tried to follow Synology instructions but I'm hesitant to do it since I don't have the options in my NAS that Synology expects. I just need to swap one drive. I tried the unorthodox style - shutting down DS923+ and removing it manually. I didn't get far. NAS doesn't like it. So I put the old drive back and its now running as before and back to square one. Could you kindly walk me how to replace my 8TB for a 20TB? I will greatly appreciate your help.
Fidel Ventocilla

[ed]

Yes, you. Here is how https://kb.synology.com/en-uk/DSM/help/D...?version=7
You can also check how capacity changes with new drive here https://www.synology.com/en-us/support/RAID_calculator