I've got the Plus license
They are formatted as xfs.
I do have a full backup to cloud, though i would not wanna do a full re-down if possible, that would be rough
Really its a price/need thing, currently i got 6tb array, which i really good enough for a while, so just going 4x3tb would be 9tb (1 parity) which would be way more then enough for a long while for me
I could even just go 3x3tb just to save a bit initally since i dont really need the storrage increase just yet.
I really wanna stay on WD Reds, and they are about 121 usd pr 3tb drive (converted from DKK) here i DK.
So i could get away with an initial spend of 363usd contra 605 usd (2x8tb wd reds).
But i do get your point
Also maybe an important note, my current server only has support for 2.5" drives, where the new can do both (also one of the reasons for migrating to a new server). though atm the new one only got bays for 4 disks, but the plan is to upgrade that to 8 or 9, if/when needed.