After purchasing a batch of postage stamps you will be able to upload files. First go to the “Files” tab. Here you can choose between three options, depending on what you want to upload: a single file, a folder or a website. After choosing your option you’ll need to add a postage stamp.
Click “Add postage stamp” and choose a postage stamp.
Click “Proceed with the selected stamp” and upload your data.
Once your file is uploaded a Swarm hash and Swarm Gateway link will be displayed (which you can use to share the file with others) along with other pertinent information.