Sharing files with my friend
Depends on the file, a LOT.

The iPad has no (visible) filesystem. So unlike a Mac or PC you can't move things around as you wish. You have to have an application that will deal with it in the form you send it via the method you send it by.

Yes you can send an .mp3 but there is no way to then add it to the music.app without a Mac or PC and iTunes. The same goes for MS Office files, Photoshop files and many other proprietary file formats.

Perhaps if you edited your question to say specifically what kind of file and what she needs to do with it, we could be of more assistance.



Like @stuffe said a free Dropbox account could help you with this. Dropbox will let you play videos right in their file browser as long as they are generally playable on your Mac (EG H.264, MP4, MOV files, etc.) Dropbox is free for up to 2GB of storage.