It seems weirdly difficult to find a good solution to attach HDDs to my pi. Best case would be for me a enclosure with small power supply, space for my pi, and at least 2 bays for HDDs, rather 4. All that for under 100€ of cause :D
I could not really find cheap hhd enclosures that connect via usb. Any recommendations? I don’t really want to use HDD toasters, they feel not permanent enough for a Nas. I could also not find sata to usb hats for the pi that are available right now
I dont know if this qualifies as a “toaster” but Ive used this docking bay in the past for a NAS and it served my purposes decently well. One thing to keep in mind is that random IO will be lacking with a usb interface. Also, this particular chipset does powercycle all the drives when one is removed so drive swaps end up requiring you to power the entire system off to perform. Also no integrated cooling may be a deal breaker as you illuded to.
If I was basing a nas build off of a PI, I would look to use the PCIe 1x2.0 interface on the pi 5 as a HBA.