Amazonaws library: how to include it?

Thanks GoToLoop for the tip, but that’s exactly what I do. 3 files have the name

aws-iot-device-sdk-java-1.3.10.jar
aws-iot-device-sdk-java-1.3.10-javadoc.jar
aws-iot-device-sdk-java-1.3.10-sources.jar

and the folder is

processing/libraries/aws-iot-device-sdk-java-1.3.10/libary

so I think it’s correct.
To make sure the file and folder names were the same, I copied and pasted the same name to everything.
For now I have placed the files in the “code” folder within the project.

P.S.
I also use the commons-net-3.8.0 library: the structure is completely different, but it works.