Setup my drives

HI I i just installed zimaos 1.5.1 beta in a virtual box machine

it has 12gb and a 128gb boot drive and 8- 350 gb ssd

i am wondering should i use all 8 drives in a raid 5 , so i can have at least 2 recovery disk (2 or 3 disk failure)

or divide them up in 4s which would be better?

also I’m having a little problem with immich and jellyfin they install no problems but i cannot see my photos or media files which are on separate drives