Good afternoon,

I have two 4TB HDDs and one 1TB HDD in my server, unfortunately no parity yet. I would like to remove the 1TB HDD and write the data to the 4TB HDDs. I've read some things about this, but didn't understand if this works and if so how. I would be grateful for answers

 

To remove it from the array you need to do a new config (tools -> new config), but note that you need to copy the data form the 1TB disk manually before or after removing it.

Thanks for your answer. So just move the data manually to one of the other HDDs. Which tool is best for this?

Easiest is probably Unbalance.