Dropbox is a well established cloud storage provider with a very generous storage quota and many great features for collaborative working which will appeal to many freelancers and business users alike.
There is no doubt MEGA is one of the best cloud storage operators in the market today, no mater which way you look at it they have all of the tools and security features you could ever need from cloud storage built right in!
Despite being new to the market, IceDrive, have developed a very impressive cloud storage offering. Solid Windows drive mounting software and lifetime plans combine make this a service to really consider.
pCloud is a well designed cloud storage service with some great security, usability and sharing features built right in. The inclusion of lifetime licences makes this offering potentially very good value to many!