Originally Posted by f5moab
Cloud based storage is nice, if you have access to the cloud.
Actually, I agree with the spirit of this comment. With Dropbox, you wind up with the best of both worlds (I don't speak to the others mentioned because I don't know the in's and out's.) Whatever device I'm using, whatever I store in my Dropbox/RV folder on that device automatically sync's up with my other devices the next time they're online. So if I download a PDF while on my laptop, save it to my computer's Dropbox folder, it will automatically sync to my desktop and phone and tablet the next time they're connected to the internet. So the files are stored locally on those machines and are also accessible from any other browser using my login info at dropbox.com . If you accidentally delete a file that you wish you hadn't, you can go to your dropbox.com account and recover it. Once you install it on the devices, you just use it as if it was any other folder in your file system. All the sync between devices is automatic.
So, yes, I also have local copies on my devices, the sync'ing of those docs is just done automatically via dropbox.
You can also share specific folders with other individual dropbox users or make them public.
I think the only exception is MP3 and video, which either require manual download or you have the option on your cell phone. The name of the file will still show in Dropbox but it seems like on those larger files they require you to say "yes, download these." If you move an MP3 to your dropbox folder on your laptop it'll auto sync to your computer(s).
That's longwinded, but I hope it helps to clarify. Once the files sync, you can access it on those devices, internet or not.