Hi, which SSD do you use for testing ? if the same SSD used, I think you should get the same result.

we used the same circuit and same chipset for both X850 and X850 but adding a shild can to improve RF interference. FYI, if using X850 with Pi4, The 2.4GHz wifi is not stable and cannot connect automatically after booting.

Anyway, thanks for your valuable feedback. we will look into this and we might remove this shield can for next version.