I'm using NUC7i5BNK with 2x 2.5" SSDs. Unfortunately I could not find any suitable case. I still want to use the fan and all ports. I think Akasa have a lot of cases but I could not find something... Any idea?
Yea, the other issue is that there is no support for connecting two SATA drives easily. You need to install an adapter in the M.2 slot that exposes the second SATA lane. Here is one example: https://www.amazon.com/gp/product/B07G2YXLFP.
My opinion is that you should use a M.2 SATA SSD and a 2.5" SATA SSD. If these are of similar size, you an use RAID across them.