We recommend that you do not exceed 300MB (Mega Bytes) as size of your final exported ePUB3 file. If you exceed, you will see upload failed message in the store when you try to add the book to the store.
We recommend that you do not exceed 300MB (Mega Bytes) as size of your final exported ePUB3 file. If you exceed, you will see upload failed message in the store when you try to add the book to the store.