Hello John,
Any digital plan from $18 and up is one that supports remote hosting, which allows you to store your files on an outside server where they do not count against your storage limits. This means it is not necessary to upgrade your E-junkie subscription to store more data on our servers, you can store the files on your own server or get hosting space through a service like Amazon S3 and stay within your $18 plan. The only real need to upgrade beyond the $18 plan would be if you had over 60 different products.