Case & Backplane Sanity Check / Inputs

I'm looking to move to an expanded case and saw this on reddit: https://www.alibaba.com/product-detail/Nas24-drive-Rackmount-Storage-Server-SupportEATX_1601393728689.html

I realize it's shorter in depth then a lot of 'standard' ones but it fits my desired use case/utility space.

Here's my current setup, acquired over several years and various upgrades: https://pcpartpicker.com/list/2TgcyW

But the critical components are:

• MB: https://www.gigabyte.com/Motherboard/C246-WU4-rev-10

• PSU: https://seasonic.ru/product/g-550/

• Card (spare/not in use): LSI 9211-8i 8-port PCI-E Card

I was leaning expanded backplane but had a follow questions/wanted some outside opinions/feedback:

• Expanded backplane

  • New PSU to support the required backplane molex #s?

  • I'd like to eventually utilize all 24 slots, so assuming I would need different card to direct support mini sas?

• Direct Connect Backplane

  • New PSU? To support all the drives?

  • Use the existing LSI in conjunction to the standard MB sata ports?

Any other things I'm missing or not thinking of?

Edited August 18, 2025Aug 18 by xFlawless11x
Link Fix