Well, since the OP didn't say exactly what sort of method was used to format that string of 16 hex digits for the 8 bytes, I'd have to remain in doubt about what the underlying byte order really is. There might have been some filtering behavior between reading and displaying that put the bytes into "logical" order for viewing by humans, being "smart" enough to know when byte swapping was necessary.

It's not a complicated matter, and is easy to test -- I'm just saying you can't be sure until you test it.