Cost of storing a file in Datastore vs Blobstore

Question

Question: Since every file in the blobstore has an associated BlobInfo entity in the datastore, do I get charged the cost of write/read of that entity just like

Answer 1

Blobstore is more cheaper than datastore , it's read/write ops it not count , and free

Answer 2

While I can't point to the documentation to say one way or another, in my experience, yes the Blobstore read and writes count towards datastore read/write ops.

If you run your app on the dev server, you can see an Entity kind in the Datastore Viewer named "__ Blobinfo __" which details each entry. It shows for me that there were 12 write ops taken to store each entity there.