Initial 3 HDDs in RAID 5 and adding a 4th HDD later?

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Hi all. I have been reading a lot of topics in both EX4 and EX4100 forums and the web itself but I haven’t found a single 100% sure answer - so here’s my query:

I am considering purchasing an empty WD EX4100 enclosure and buy the HDDs seperately - yup it turns out cheaper that way here.

So I will start off by purchasing 3 x 4TB WD Red HDDs and will set up in a RAID 5 configuration. When it will be needed I will purchase a 4th 4TB WD Red HDD and will add to 4th empty bay. So to the question - will I be able to expand my RAID 5 set up with it automatically reparsing and rebuilding the data across the four HDDs without me having to reformat or loss my data on the initial 3 HDDs?

Thanks for any help provided!

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Hi there and welcome to the WD community.

You should be able to add a 4th drive when you go to the dashboard under storage you should be able to see an option that lets you expand the volume or migrate.

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Yay thank you for your reply. This is definitely helpful

I’m now thinking of getting 2 x 6TB WD Red HDDs and configure them to RAID 1 and when the times comes, get the 3rd and migrate to RAID 5.

Note: I haven’t tested the suggestion