Digital downloads refer to products that your customers need to download from your site after making a payment. Products such as e-books, videos and MP3s can be sold in this way. 

*Digital download is available for any Miiduu paid plan. 

Now create a new product (Catalog -> Products -> Add) and name your product. Fill out the product information as usual. 

Then, Go to “Advanced Options”. 

Set the “Requires Shipping” option to “No” to enable the Digital Download Product.

Check “This is a Digital Product” and click on the “Upload File” icon to upload your digital products.

Click save, and you're done!
Your digital product is now for sale on your website! When a customer purchases the product, it will not be available until the payment is confirmed by either you or the 3rd party payment solution (PayPal, etc). Once payment is confirmed, they can access their account page on your store, and click "Downloads", where they will be able to download the product and see how many downloads they have remaining.

At present, multimedia formats supported by are as follows: 'jpg', 'gif', 'mp3', 'm4a', 'ogg', 'mp4', 'm4v', 'mpg', 'mov', 'avi', 'flv', '3g2', '3gp', 'wmv', 'pdf', 'doc', 'xls', 'ppt', 'zip'.

Note: For digital downloads, customers cannot use "Guest Checkout" when they finishing buying products. You may go to "Settings"->"General"->"Advanced" and shut "Guest Checkout" down in "Advanced" tab. Customers also cannot use PayPal Express to check out. 
* For digital downloads, your products require no shipping method. If you set the tax, then your customers will be charged 
based on store owner's/seller's address,not customer's address. Consequently, no matter where the customer's from they'll be charged the tax.