A simple thing like not having a file manager just puzzle people who purchased a Windows Phone. I know that because my co-workers bang on my door asking for help. And if you want to manage your phone on windows, you need Zune.
This! +1, spot on.
I really like my Omnia W, it does what I need it to do (though in all honesty I do wish it could sync a little more data) but I hardly update my media contents because, as you very well mentioned here, that part is totally fucked up.
The reason I'm responding is that your message could make people think that you can then use Zune to somehow copy files back and forth but you can't even do that :(
Instead you need to point Zune to a folder on your PC after which it'll keep that folder synced with your phone. Which shows the completely screwed up design; I don't want each and every one of my mp3 files to be stored on my phone. As such I can't simply tell Zune "there's my music, go sync".
But you also can't easily tell Zune "there's my music, I want this, that and that". Because Zune doesn't work with files and folders; it'll use the information retrieved from the MP3 files. So now you need to somehow give your MP3 files some info so that you know what you have, THEN copy it over. I don't have that because I didn't care for that; I ripped some of my CD's and simply let a player randomly play files (these are files from a time before we had id3.org and such).
As such you'll soon find out that the easiest way to do all that is to copy your stuff to a folder, point Zune to it and then try to get it to copy stuff. More than often it won't because you don't copy; you synchronize. That translates to: "You click a button and hope that it'll copy the media across that you want, but there's no way to be sure but to disconnect the phone and see for yourself".
And don't get me started on "What happens when you discovered that you wanted that extra file to be included afterwards?". Zune will eventually spot the changes; just not one minute after you copied a file to a directory. What idiot thinks that I want to wait 5 minutes for Zune to cope? I want my media copied NOW.
SO you're eventually done, all is well. Because you don't need the bloat you remove the folder which you made with all the mp3 files because there's not much sense keeping the same files on 2 places at once. Waste of space, no ?
And then, several months later, you connect your phone somewhat casually to your PC to charge it. Normally you'd use the adapter but you're in a hurry; you simply take the adapter with you. Then sitting in the bus you want to listen to a nice piece of music...
All of that got neatly synchronized and therefor is now also no longer available on your phone, just like its gone on your PC. Microsoft couldn't have made it any easier; apart from the fact of course that I didn't WANT my files to get removed like that.
Zune is sheer hell. Yet required for WinPhone, go figure :(