Hi, I am new to Android and just got a Samsung Galaxy S4 (for several years I had iPhones) and I am enjoying it. Now that I have gotten all my music files away from iTunes' clunky clutches I have reorganized them and they are on my S4's sim card and it works great. The issue is that I have updated a few of the files and moved a couple more around. I want to update those music files on my S4 from my PC. I could just delete the Music folder on the S4 and recopy everything over, but that seems to be a huge overkill. What is a good way to compare files between my S4 and folders on the PC and match/update between the two? I am using Windows 7. I have tried to map the Sim Card as a drive but couldn't get that to work. I have Kies from Samsung but that is kinda clunky. I have also tried AirDroid (which I think is great) but I can't really sync files with that. Normally I would use a Windows application like Beyond Compare or WinMerge to do something like this. Thank you for the help.