> The first link you provide actually says the first reason is due to security To me personally the security claims don't make much sense either. When I face

> The first link you provide actually says the first reason is due to security To me personally the security claims don't make much sense either. When I face disk space limitations I don't delete my spreadsheet of survey results that's full of private information. I just delete the original video of that public lecture that I've put onto youtube already anyway. Now, for professors there might be a case for shunting the files they haven't touched in a few years into secure offline storage in case it contains forgotten private information. But it sounds like this applies to student accounts, and there's already a process to eliminate forgotten years-old data: Graduation. IMHO it's far more likely this is a cost-saving measure.