Hey now. Say you need to MOVE data from an SSD in a main office to an HDD in a remote office. Do you ship it all on a NAS, or burn it and ship a disc. Or what if you need to do a bare metal restore of a failed server from backup. Do you wait all day for it to stream data across a slow WAN link, or have a disc locally? Heck, say you buy a game that takes 20+ GB of space. Do you download the whole thing if you live in an area where high speed internet is either unavailable or extremely expensive (as is still the case in much of the U.S.) or just get a disc from Best Buy?
Next, are you going to ask why anyone would want a TB or larger hard drive when you can just store all your files online? Heck, why get your own quad-core processor when there's cloud computing around? Hey, why not just replace your dedicated PC with a dumb terminal and a citrix session to a mainframe somewhere?
There IS a use for physical media! Anyone who says otherwise has no grip on the real world.