Which Are You? How many emails are in your inbox? If the answer is thousands, or if you often struggle to find a file on your computer among its cluttered hard drive, then you might be classed as a digital hoarder.

In the physical world, hoarding disorder has been recognised as a distinct psychiatric condition among people who accumulate excessive amounts of objects to the point that it prevents them living a normal life. Now, research has begun to recognise that hoarding can be a problem in the digital world, too.

“Collectors” are organised, systematic and in control of their data. “Accidental hoarders” are disorganised, don’t know what they have, and don’t have control over it. The “hoarder by instruction” keeps data on behalf of their company (even when they could delete much of it). Finally, “anxious ho...