All work from Adobe CC by saving files in an external hard drive...

Thanks. I have to ask b/c I haven't signed in with CC and based on what wikipedia was saying, "Customers must pay a monthly subscription fee and if they stop paying, they will lose access to the software as well as to the work they saved in proprietary file format, which is not backward-compatible with the Creative Suite." I also am curious if you can use the files you made from the cloud through CS programs? It looks like if I did save a file to my hard drive lets say from Photoshop CC, I may not be able to use that file in on Photoshop CS.