Advice for clean upgrade to 24.04 from 23.10 with RAID1 using mdadm

[filosofic]

Looking for advice on how to to a clean install / upgrade from 23.10 to 24.04 on a desktop computer I use for streaming/Plex that also has 2x12 TB (Ext4) drives in RAID1 configuration using mdadm.

Currently I have Ubuntu & Windows 11 dual boot but plan on only using Ubuntu and install on the 512GB SSD HD -- considering on using BTRFS instead of Ext4.

Will Ubuntu be able to recognize the RAID drives?
Is there some backup of config files that I ought to do?
Are there any other considerations I ought to be aware of?

I'm no Linux expert but am comfortable with CLI/Bash. Any advice much appreciated.

[TheFu]

A clean install is very different from an upgrade. I'm confused. Pick 1.