I'd like to put my 3.5" floppy in her disk drive, if you know what I mean.
I think "floppy" is the wrong word to use here.
Go with a USB flash drive. That way you can also make a reference to the size and virus protection.
But a 3.5" floppy isn't really floppy.
Which isn't something I'd brag about, given the whole 3.5" bit.