Devices which supports Secure folder among M series.

[Š]

https://www.samsungknox.com/en/knox-platform/supported-devices

M10s released with secure folder.

M31s recently received with One Ui core 2.5 update

M51 should receive it in future. 

No other M series devices have Knox security and won't receive secure folder. 

[vic31]

if in future if knox can be used fully then we might get samsung pay too as a default payment platform...
just hope that it may get full version of knox