Re: A few things
>> 1. How many mobile devices will still be around which have data from 2014?
I'm using one to write this. Don't assume everybody upgrades on a regular basis, least of all someone who works for a reseller.
>> 2. Why would past employees still have company data from 2014 on their personal devices? That would surely be a breach of data protection laws
Because they were keeping it because they thought it would come in handy as evidence of illegal activity. Most people would regard that as a justified breaking of the data protection law, even if they understood that law, which most people don't.
>> 3. Why oh why would you keep such a significant recording on a single, old device and not copy it to other places? At least by sending yourself an email or backing up on to a USB stick.
Because you're a businessman, not a techie, and don't even understand what a backup is, let alone bother to ever make one.