Yes, you can upload your track stems in a compressed .zip file, however, size limitations may apply. If your file is too large, we suggest hosting your track stem file on a 3rd party cloud service i.e. DropBox and use the link option in your BeatStars account.
NOTE: For any production tracks you wish to sell an exclusive license for, you must provide track stems. Please also ensure these links remain valid and direct to the specific file at all times as broken links can lead to issues with your customers.