The complete 3-volume Urdu translation should be between 50 MB to 150 MB (depending on scan quality). If the file is 2 MB, it is either an abridged version or a corrupted file.
A reputable source in Pakistan to purchase the physical, multi-volume Urdu translation of Madarij-us-Salikeen. UrduBook.com (Madarij-ul-Salikeen) A direct link to buy the Urdu/Arabic version of the book. Facebook Community Discussion (Toobaa Library) madarij al salikeen urdu translation link