You need a license for Share Premium, that can be activated in Store/Apps. Share Premium allows you to store up to 1 GB for a year and you can buy even more with credits, that you manage through your walltet.
You can access your projects on other PCs if you previously uploaded them and they won’t disappear anymore when you share them, although you’ll need to unshare projects time to time or it will consume your storage space. You can even work together on a project with the Check-out / Check-in feature.