Hi @ybangou ,
.yxmd and .yxzp are proprietary file type for Alteryx Desktop Designer.
You can open .yxxp as a zipped file.
You can extract the input data and expected output data from .yxzp and upload them to your Designer Cloud.
If the input data is directly embedded in .yxmd file, it may be difficult to get it.
(I would not say it is "impossible", but you may need to hack the xml structure inside the file...)