I see this scenario play out constantly:
1. A team or staff member has a project's data located on their user account or hardware.
2. The team or staff member are made redundant when there is a dip in earnings.
3. IT make a backup of the user account/s and wipe the hardware, and because it's older usually move it on.
4. Months or years later that data is needed and at this point no one at the company actually knows where the data is - and even if they find something, they don't know if that's the latest or the full version.
Now this wouldn't be a problem if there was a decent overlap in staff retention, but that simply isn't the case these days.
Writing better storage policies doesn't help - it's the understaffed nature of their businesses which mean that there is no time for staff to keep up with basic data housekeeping.
The types of data that clients should have on hand, but nevertheless have asked me to supply, are frankly embarrassing.