Being in China, I've come across a few foreigners in the surrounding cities and a few nights ago they brought their PC based External HD to my place, where I grabbed an array of their files from their PC Based External HD, onto my OSX Desktop. . . which worked perfectly as expected... However, when wanting to drag some of my files, ranging from documents to videos (all teaching material), I was not allowed to drag my OSX files onto their External HD. . . I'm simply wondering if any Mac Apps exist out there that will allow for my OSX to transfer files onto an external HD that comes from a PC laptop. .