<t>When I look up the largest files in my OneDrive folder (on the website), I find a bunch of large mp4 files with just a number for file name. I do not recall creating these files myself, even though some are created recently. The location is a long hexadecimal number with some hyphens.<br/>
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When I try to delete these files a small pop-up shows that one item was not deleted; item not found. When I try to open the location, I see a long list of empty items (no text, neither in the header nor in the list, but I can select / tick the items).<br/>
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What does this mean, and how can I reclaim the significant portion of my OneDrive quota which these files seem to occupy?</t>
