Moahawk

Hi I'm quite new to this and I consider doing the very same thing with my Raid1 setup consisting of 2x 2TB drives swapping to 8TB ones, but since I'm quite new to this and this HexOS system is my first NAS experience, I'm hesitant to just pull them out one by one and try for the best, I would like get some reinsurance that I'm not about to loose my precious data, can somebody help me find out what are the proper steps of doing this or at least point me in the right direction? I do know how to get to the TrueNAS UI... but that's pretty much it when it comes to that 😛