replace HD 2TB to 4Tb

[NAS_user]

There is DEFINATELY a procedure to do this.

1. Get an external 2TB USB drive and backup the NAS. Seriously.
2. Replace disk #2. . . .you will get a message to “rebuild raid”. Do it.
3. Wait a day. . .it takes time
4. Replace disk #1 . . . you will get a message to “Rebuild raid”. Do it.
5. Wait a day. At this point. . . the NAS is going to show 2TB nas.
6. Do a “Expand volume”. This will convert the system to 4TB.

I never did this myself. . .so user beware.
When I ran out of space. . .I just bought another NAS

Edit:
Oh. . .my procedure works. . but there is an easier way:
Follow this procedure: My Cloud: Upgrade the Drives on a Device (RAID Expansion)

This is basically executing the same steps in a script.