I use a USB HDD a lot between lots of different Windows Boxes.
What I find after a while is that there get to be lots of different Permission on the files in some cases stopping me looking at files or removing them. They want Admin rights or even sometimes you need to put the disk back into the original machine with the original user.
This is a right pain.
Is there away of making the disk have Modify All for All Users and making this the default for all files on the disk.