I have fallen in love with Dropbox!
I was first introduced to Dropbox by a colleague. She recorded herself singing some songs for our district honor choir for the students to use when practicing. She shared the audio files with me via Dropbox.
I have also used Dropbox to store sheet music. I scanned the music for the All-State Children's Chorus and uploaded it to my Dropbox so that I would be able to study the scores at home on my iPad, even if I forgot the sheet music on the piano stand at school. Likewise, it prevented me from leaving the sheet music at home and not being able to rehearse with it at school. In fact, at All-State Children's Chorus, my student forgot her music in the car, which was parked 4 blocks away in a parking garage. I gave her my iPad and she was able to view the sheet music via Dropbox!
The biggest use for Dropbox has been with my preparation of my National Board Portfolio. When I began the analysis of my videos, I first set up two laptops on the kitchen table. One would be used to play video footage while I typed on the other. At some point, I had an epiphany and uploaded my videos to Dropbox. I was able to view them on the iPad and type on my laptop. I also uploaded all the instruction manuals (which were organized in a 2.5 inch binder). With Dropbox, my iPad replaced a laptop and a huge binder. It was much easer to move my things upstairs and downstairs when needed.
I was also able to share files with my sister so she could proofread them. When you open Dropbox on your computer, you can drag and drop files into the folder as you would into any other folder. It is very easy!
If you have not tried Dropbox, you should check it out!