In need of apple iPhone X, Xs or XR in good working condition as backup phone.
Battery health has to be 84% or higher.
All buttons & functions has to be working.
Please PM if you’ve one or two to let go off.
Still it's better to let the HDDs breathe on top and bottom.
My suggestion would be to stack up leaving atleast 5mm of air gap between the HDDs and PSU.
Even with thumb screws(insulated) like this would do;