Earlier quoted context omitted.
Totally forgot about images. I just dug little further and found this: "The size of the media files in Wikimedia Commons, which includes the images, videos and other media used across all the language-specific Wikipedias was described as well over 23 TB near the end of 2014" Considering 30 TB hdd costs around 1500$, still interesting.
I wonder what the size is as of this moment, maybe double? I read somewhere recently that 90% of the content on the Web was created in the last 2 years. Not sure if thats "special media" focused, i.e. video & pictures, as opposed to text. But I'm sure the size of the dump has increased substantially in the last 4 years.
Very likely, there at least need of a filter at some level to size down (maybe getting single language or converting videos to low-res)