When you use one of our addins, the conversion to a mesh takes place on your machine (or on the Onshape servers), and it is only the converted files that are uploaded securely to our servers. If you upload via our website, then the conversion takes place on our servers and as soon as it has been completed your original data is discarded securely.
These converted files do not have any of the clever parametric data of your original files, and it is optional whether you want to include any meta data (also known as custom properties). Don't forget that you only need to convert the components that you actually want to be seen and worked with, so you may find that you also remove unnecessary detail from your assemblies.
We partner with industry-leading hosting providers to create redundant and reliable hosting infrastructure. We host our data on Amazon Web services (AWS) located in the United States. We make frequent automated backups of customer data and have implemented up-to-the-minute recovery options where feasible.
We store backups in a redundant way and test our recovery frequently to reduce the likelihood of data loss and minimize downtime in a large-scale disaster. We have built redundancy into all our services to eliminate single points of failure in our infrastructure.