Something better
I used to have a lot of the same issues that are being raised by the readers here, but about six months ago we switched to this device called the CloudLocker which basically acts like a private cloud device. It's this hybrid of cloud and NAS. It has more functions than Dropbox or Amazon but will all the security of an NAS device (since all my files are on the device and not on an online server). In any case the CloudLocker has made our lives so much easier at work. I really believe the private cloud device is the future of this sort of technology,