Samsung pulls the plug on My Knox, suggests switch to Secure Folders
In 2014, Samsung introduced My Knox to its handsets. This was a security platform that separated a user's work apps from his/her personal apps, and kept them secure. The Knox "sandbox" allowed users to use the same phone for work and play without having to worry about work data getting stolen or mixed up with personal apps and content. But today, Samsung sent out an email to customers announcing that My Knox is being discontinued and will no longer be available on new Samsung handsets this year. Those using My Knox will be able to keep using it until the end-of-service date, which has not yet been announced. However, Sammy will no longer support the feature.
As for My Knox, once the end-of-service date comes, this is one sandbox that Samsung users won't be playing in anymore.
source: AndroidAuthority
Things that are NOT allowed: