Copy cloud services now has a special free give away for online storage. You get 15 GB for free, + 5GB for each referral. What makes Copy different from most other cloud services (such as Skydrive and Dropbox) is that it has no limitation on file size. So perhaps it is interesting for remote sensing purposes/syncing of smaller projects, since those images can sometimes be too large to be accepted by other services.
Also the pricing is attractive, if you are into that (group users etc.)
See the link below:
https://copy.com?r=AMB6mp