No network = no access to anything. Anyway HDDs dirt cheap.
the 3 popular cloud services from Dropbox, GooogleDrive (provided by Google) and Skydrive (Provided by Microsoft) all have the facility to keep a sync copy on as many computers' local drive. Once setup, you treat it like any local files in your computer, you can open, edit, and continue to update the folder, and once the computer is connected to Internet, it will automatically update the cloud storage as simple as that.
And if you have more than one computer, you can setup the local copy sync in more than one computer called Com A and Com B: you make changes, add more photos in computer A off-line, once computer A is connected to internet, it will update the cloud copy and later when computer B is also on line, it will also be updated. If you lost both computer, you can still access the cloud copy and if you are not on-line, you still can access your photos directly from your computer locally. Better still, you also do a external drive backup of your computer, in this way, you have your photos in 2 computers, cloud and backup drive, and operation is so simple and seamless.
Another advantages is that, the cloud storage also keep track of files deleted, and few old revisions of file for you.