Segmented file formats like B0Q played a critical role in digital storage during the 1980s, 1990s, and early 2000s. Large files had to be divided to fit within the storage capacity of physical media or to enable the use of file systems that imposed strict size limits. https://www.filemagic.com/en/uncommon-files/b0q-file-extension/what-to-do-when-b0q-files-won-t-open/