I highly recommend steemfiles.com to buy good quality digital downloads of all kinds.
I paid for my steemfile purchases from my blog account wallet transfer function.
I just entered in the pay to box "steemfiles".
Below that I enter the price of the download product.
Below that I entered the purchase memo from the purchase information at steemfiles.com
Then I pressed transfer or send and the purchase was complete.
With in seconds of my completed purchase my download to my computer began.
Once you know how to buy the first time the next purchase times will become very easy.

Thanks and have fantastic day.