Hello, I understand that you want a box for a complete pc, right?
What budget do you have, how much do you want to spend?
What size box do you want? What motherboard format are you going to mount?
what CPU?
What graphics card?
Air heat sink or liquid cooling? In either case, what size?
What power supply, what size?

Good afternoon, let me explain, I already have what the motherboard, processor, heat sink, RAM memory, power supply, etc.. what I am looking for is a box in which I can mount all those components, but I need it to have a minimum for 4 hdd of 3.5 ", the plate is micro_atx.

a greeting

I do not want to spend more than 70 euros in the box

Hello, I have tried to answer you, but my answer is not published, let's see if I have luck, a box option for €70 with space for 6 3.5" hdd plus 2 2.5" may be the Phanteks Eclipse P400A, in pccompoentes you have it for €70