Hi coco7,
The H Indicates the HSDPA(High-Speed Downlink Packet Access) data connection being used.
You can use your USB modem on any PC/Mac as long as it is compatible with the device software, usually if it is Windows XP or newer then to be honest I can't see you having any issues. If you need to update the software to be compatible with the PC then please check out the
Latest Software Version of Mobile Braodband.
In regards to downloading music on to a disc, then this really wouldn't be something we could help with as it can depends where you are downloading your songs from, what PC/OS you are using and the and in what format so to be honest, the best bet would be to chase this up online or ask a friend or family member.
Hope this helps.
Many thanks
Andrew
eForum Team