Large files are split to bypass the upload limits of hosting services or to fit onto smaller storage media like FAT32 drives.
Downloading multi-part archives from third-party sources carries inherent risks. Users often encounter these files on community forums or sharing sites where "O B" might also stand for "Open Beta" or a specific project initials. Download (O B) part3 rar
If a single 50GB download fails at 90%, the entire file is lost. Splitting it into 5GB parts allows a user to only re-download the specific corrupted segment. Large files are split to bypass the upload