Long live the useless. Do you have a useless.avi story? Or did you just delete one without looking back? Tell us in the comments.

In an age of terabyte hard drives and 4K streaming, we obsess over optimization. We tag our photos, meticulously name our spreadsheets, and backup our "Final_Final_v3" documents to the cloud. Yet, lurking in the forgotten corners of our external hard drives and dusty USB sticks, there is a file type that defies all logic: useless.avi .

It is a ghost. It is a confession. It is the digital equivalent of a shrug.