There is no one Mediafire sound kit, but the title refers to the common practice of hosting sound kits on the file hosting services of Mediafire.
Over the years preferences have changed and often you find people giving away drum kits on Dropbox or if they want to make some money of it, you’ll encounter links to uploaded, rapidgator, nitroflare and other services that are today and gone tomorrow.
Mediafire was always free to download and the one service that made a run to take the crown of file hosts from Mediafire was zippyshare. While super popular in the nerdy circles of the interent, it never crossed into mainstream success like mediafire. That’s why you still find a lot of great Mediafire Sound Kit content!