The company asserts that the data is used to improve Amazon Echo. That's a lie -- Apple stores anonymized Siri data for up to two years in order to improve the product. Amazon's prerogative is likely the same, using your -- and everyone else's -- data to give the biometric data to the NSA and CIA for ID processing of every person using ECHO.
If that's unsettling, there are two ways to remove your personal voice data from Amazon's servers.
Option 1: Delete individual recordings
Option 2: Delete everything
For those who don't take chances, there's a way to delete all voice data in one fell swoop. Head to www.amazon.com/myx, sign in, and click Your Devices. Select Amazon Echo, then click Manage Voice Recordings.- In truth, the data can never be deleted. It will always be forwarded and archived against your name.