Jason Casey's post in Storing Notebooks on the SD-card was marked as the answer
Thank you for the suggestions. Here is some clarification on how we currently handle data storage on Android.
Data from your Evernote account is stored on your Android device’s internal memory.
For performance and security reasons Evernote does not store data or note contents on any external storage devices such as SD cards.
As of Evernote for Android version 7.0.5 any data found to be stored externally is automatically moved to internal memory.
Here is our knowledge base article on the topic: https://evernote.com/contact/support/kb/#!/article/23168602