Import mbed os library failed!

[scarleast (scarleast wei)]

I Am Download the whole,which Folder I should put this in?

@JohnnyK

If you want to create whole project, you need to download whole MbedOS from github, then create a file with name mbed-os.lib and inside place a correct commit ID also from the github in correct format https://github.com/ARMmbed/mbed-os/#9a8c9e2c297f64c805698d72cd541ff3cd7fe538 .
Mbed-os (folder), mbed-os.lib and a empty main.cpp place to a new project folder and then start the studio.