Whats The difference between.......

DropBox and SkyDrive are more alike than Google Docs. They both act like virtual lockers in the cloud. SkyDrive offers 25GB free to any Windows LIVE account holder. DropBox gives you 2GB free and you can earn up to 8GB by inviting people to the service. With these 2 services, you can store multiple files such as programs, pictures, videos, and other things.

DropBox goes one step further, and allows syncing to all of your devices, whether it be Windows, Mac, Linux, iOS, or Android. It also has native apps for download for each OS. SkyDrive is more oriented for browser use, and you just upload and download from there.

SkyDrive also has Microsoft Office in the Cloud for you to edit files and programs, something that DropBox doesn't have. You also need to have a Windows LIVE account in order to use the service.

Google Docs is for documents (duh..) such as .docx and .pptx. Google has their own formats as well, and if you save files using their own formats, you can save an unlimited amount of files to the service. But like I said, its only for files such as word documents, spreadsheets, or presentations.

There are other services that you can also try if you want, for instance Ubuntu One is a great alternative to DropBox if you run Ubuntu on your machine. There is also Box.net, which offers the same thing as SkyDrive. Box is integrated with Google Docs, but can also store other documents. And if you own an HP TouchPad, you can sign up for Box.net and get 50GB of storage absolutely free.

Its a matter of choice really, and I'm afraid I don't really know the prices for other sizes for the services. What I just explained is offered to you for free. With DropBox, paying extra just adds additional storage, as with other services. With Box.net, paying gives you more storage and a desktop app to sync your folders with, since that isn't offered for free.

Just do some research, try somethings out. If you have a Windows LIVE ID and/or Google Account, it wouldn't hurt to try out SkyDrive and Google Docs respectively. Since there would be no additional sign up you would have to do. Just look around, I'm sure you'll find something to fit your bill.