You do realise you will end up with TWO drives in your DNS-320 using that method not the one you are looking for.
Yes i realized that.I just removed the old Drive after that.
Maybe someone want to do the same, so here how i did that:
1. Shutdown
2. remove old drive from slot 1 and maybe ist a good Idea is to mark it
3. Insert new Drive in that Slot 1
4. Power Up, and open Browser to format the new Drive (10min.)
there coming two windows 1st formating going to 100 Percent and i thougth it was finished.
But Later a second Window is coming "Initializing"
5. Shutdown, old drive in Slot 2, Power up
Now i was a bit surprised that the shared folder are on "Volume_2", i have expected an error.
6. Management-> Accountmanagement->Networkshares->Reset Networkshares
7. Application-> Local Backup->Cat:Internal,Type: Folder,URL: home_2,Saveto: home_2, Incemental BU, Time: 2minutes in the feature, Save.
8. Wait until it finish,Speed is about 20MB/sec.
9. Check if used Size is the same as on Volume_2, i had to restart the BU once more.
I notices that the Fan was really noisy, that i have expected. That is the reason i only want to have one Drive in the NAS.
10. Powerdown, remove old drive.
11. Remove the Standartshare "Volume_1", an recreate my old foldershares
EDIT:
The upnp shares are not working after the upgrade.
12. Remove the shares: Management->Application Man.-> Upnp AV Server- -> delete and recreate shares.
The FTP/Http Download tasks are gone.
13. i had to recreate. Application->FTP/Http Downloads