This is very quick and easy if you just use a big movie or similar as you don't have to upload the full contents.
I had a 6gb movie on a pen drive, plugged it in, told it to upload, and it added on all my extra space within about a minute, I didn't have to really upload hardly anything. Then I just deleted the uploading movie from my dropbox folder, job done, took about 5 mins in total.
I had a 6gb movie on a pen drive, plugged it in, told it to upload, and it added on all my extra space within about a minute, I didn't have to really upload hardly anything. Then I just deleted the uploading movie from my dropbox folder, job done, took about 5 mins in total.