To get it out of the way, I DO NOT get paid for recommending these products; nor am I affiliated with them in any way.
I will show you a free method and paid method of mounting your cloud storage as a drive. The drawback of the free method is you still need the files locally in a folder already synced. This method of mounting serves as a user experience upgrade since you can access your cloud storage files as if it was on a separate drive rather than drilling down into a folder.
The paid method is to use one of two software options available right now either ExpanDrive or NetDrive. It will mount your cloud storage as a network drive. The massive advantage of this is you can mount terabytes of stuff and access it, even if your hard drive(s) on your computer do not have the capacity to store; or that you don't want to waste your bandwidth syncing everything all the time.