Hi, looking this Black Friday to get some WD Red Pro’s if they drop in price (buying from Canada) – we have two at home, one is a 5 bay and one a 3 – we want to eventually switch the 3 bay which is a newer 920+, the older one is a 1513+ which we like to keep — for now before we buy more space in a couple days, we nabbed an 18 TB WD Elements to use as an off-site backup solution since we wanted to free some of the space used for redundancy in our RAID configuration (not sure if this is what’s referred to as “off-site” – kind of a noob lol)

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My question is at this point is there a way to safely free the redundancy space, and it won’t affect my data, or should I wait to get the WD HDD in a couple days and copy everything to that, then I re-format or wipe the drives? Just in case we pass on buying new internal HDD’s this Thanksgiving, I did want to at least free some extra space

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Looks like the 1513+ I’m trying to free are five 4TB Seagate st4000dm000 in a 'Synology Hybrid Raid (SHR) (With data protection with 1-drive fault tolerance)

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Thank you for any and all help