Transfer Music from 360 to One S

They don't work in the way you think.

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You can play music from them because the 360 sees them in the exact same way it sees a USB stick, in that it thinks they are just a storage device. You can't transfer music from them to the 360's hard drive though, the only way to do that is by ripping from
a CD.

Doesn't solve the problem of purchased content, that being Xbox music videos failing the promise of all music and videos transferring with your account from the 360 to the One.

No, there is no way to transfer the music from an Xbox 360 to a USB or blank CD.

This is from the Xbox page.

Transfer the fun to your new Xbox 360®. The hard drive transfer cable moves content from any Xbox 360 or hard drive to your new Xbox 360 S or Xbox 360 hard drive. Easily transfer HD movies, music, saved games, player profiles, and even full games installed
on your hard drive. Plus, use the cable over and over if you choose to get a new console or hard drive again in the future.

[quote user="xC4RVERx"]

So to transfer games that are downloaded to the hd, from 360 to the one, I'll have to just re-download them? If I can't transfer the games I probably won't buy the one for a while.

[/quote]

Games are not transferable to the X1. Only music and video.