I can highly recommend Dropbox having been signed up to it for about a month.
Wasn’t quite sure how it worked when I signed up to it, but now use it a lot, as I’m often moving between using a laptop PC, iMac and mobile devices.
Using Dropbox I can store documents either on laptop or iMac and then access them across all devices, including iPhone, and there’s also web access via the Dropbox website (which I only just realised was available)
One big plus also is that its free, with more than enough storage to start off with – 2 Gb.
If you’re moving between different computers and devices as most people are nowadays, its the ideal way to have documents available across all your devices.
The link to sign up is: http://db.tt/2jVedovf