The primary value of the offline version is that it doesn't need an internet connection to work. This is critical for Windows XP for two reasons:

For technicians in remote areas or those fixing PCs with broken Ethernet ports, this file was a literal lifesaver. It could scan a Windows XP machine, identify every piece of hardware, and inject the correct drivers without needing a single byte of internet. A Deep Moral Complexity

Unlike the "Online" or "Lite" versions, the Offline build is several gigabytes in size. This bulk is its greatest strength.

A working USB drive (FAT32 formatted) or a blank DVD.