Leo Kelion, BBC News:

I submitted a subject data access request, asking Amazon to disclose everything it knows about me

Scanning through the hundreds of files I received in response, the level of detail is, in some cases, mind-bending.

One database contains transcriptions of all 31,082 interactions my family has had with the virtual assistant Alexa. Audio clips of the recordings are also provided.

And:

Clicking on another file reveals 2,670 product searches I had carried out within its store since 2017. There are more than 60 supplementary columns for each one, containing information such as what device I’d been using, how many items I subsequently clicked on, and a string of numbers that hint at my location.

One spreadsheet actually triggers a warning message saying it is too big for my software to handle. It contains details of the 83,657 Kindle interactions I’ve had since 2018, including the exact time of day for each tap.

This great read is the story of how this all evolved. Chock full of detail, chock full of links. Well done Leo.